1 ----------------------------------------
2 14 December 2009. Summary of changes for version 20091214:
4 This release is available at www.acpica.org/downloads
6 1) ACPI CA Core Subsystem:
8 Enhanced automatic data type conversions for predefined name repairs. This
9 change expands the automatic repairs/conversions for predefined name return
10 values to make Integers, Strings, and Buffers fully interchangeable. Also, a
11 Buffer can be converted to a Package of Integers if necessary. The nsrepair.c
12 module was completely restructured. Lin Ming, Bob Moore.
14 Implemented automatic removal of null package elements during predefined name
15 repairs. This change will automatically remove embedded and trailing NULL
16 package elements from returned package objects that are defined to contain a
17 variable number of sub-packages. The driver is then presented with a package
18 with no null elements to deal with. ACPICA BZ 819.
20 Implemented a repair for the predefined _FDE and _GTM names. The expected
21 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
22 possible problems (both seen in the field), where a package of integers is
23 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.
25 Implemented additional module-level code support. This change will properly
26 execute module-level code that is not at the root of the namespace (under a
27 Device object, etc.). Now executes the code within the current scope instead
28 of the root. ACPICA BZ 762. Lin Ming.
30 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
31 problem where mutex errors can occur when running a _REG method that is in
32 the same scope as a method-defined operation region or an operation region
33 under a module-level IF block. This type of code is rare, so the problem has
34 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
36 Fixed a possible memory leak during module-level code execution. An object
37 could be leaked for each block of executed module-level code if the
38 interpreter slack mode is enabled This change deletes any implicitly returned
39 object from the module-level code block. Lin Ming.
41 Removed messages for successful predefined repair(s). The repair mechanism
42 was considered too wordy. Now, messages are only unconditionally emitted if
43 the return object cannot be repaired. Existing messages for successful
44 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.
46 Example Code and Data Size: These are the sizes for the OS-independent
47 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
48 debug version of the code includes the debug output trace mechanism and has a
49 much larger code and data size.
52 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
53 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
55 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
56 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
58 2) iASL Compiler/Disassembler and Tools:
60 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files
61 were no longer automatically removed at the termination of the compile.
63 acpiexec: Implemented the -f option to specify default region fill value.
64 This option specifies the value used to initialize buffers that simulate
65 operation regions. Default value is zero. Useful for debugging problems that
66 depend on a specific initial value for a region or field.
68 ----------------------------------------
69 12 November 2009. Summary of changes for version 20091112:
71 This release is available at www.acpica.org/downloads
73 1) ACPI CA Core Subsystem:
75 Implemented a post-order callback to AcpiWalkNamespace. The existing
76 interface only has a pre-order callback. This change adds an additional
77 parameter for a post-order callback which will be more useful for bus scans.
78 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
80 Modified the behavior of the operation region memory mapping cache for
81 SystemMemory. Ensure that the memory mappings created for operation regions
82 do not cross 4K page boundaries. Crossing a page boundary while mapping
83 regions can cause kernel warnings on some hosts if the pages have different
84 attributes. Such regions are probably BIOS bugs, and this is the workaround.
85 Linux BZ 14445. Lin Ming.
87 Implemented an automatic repair for predefined methods that must return
88 sorted lists. This change will repair (by sorting) packages returned by _ALR,
89 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
90 and do not contain NULL package elements. Adds one new file,
91 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
93 Fixed a possible fault during predefined name validation if a return Package
94 object contains NULL elements. Also adds a warning if a NULL element is
95 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
96 include repair or removal of all such NULL elements where possible.
98 Implemented additional module-level executable AML code support. This change
99 will execute module-level code that is not at the root of the namespace
100 (under a Device object, etc.) at table load time. Module-level executable AML
101 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
103 Implemented a new internal function to create Integer objects. This function
104 simplifies miscellaneous object creation code. ACPICA BZ 823.
106 Reduced the severity of predefined repair messages, Warning to Info. Since
107 the object was successfully repaired, a warning is too severe. Reduced to an
108 info message for now. These messages may eventually be changed to debug-only.
111 Example Code and Data Size: These are the sizes for the OS-independent
112 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
113 debug version of the code includes the debug output trace mechanism and has a
114 much larger code and data size.
117 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
118 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
120 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
121 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
123 2) iASL Compiler/Disassembler and Tools:
125 iASL: Implemented Switch() with While(1) so that Break works correctly. This
126 change correctly implements the Switch operator with a surrounding While(1)
127 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
129 iASL: Added a message if a package initializer list is shorter than package
130 length. Adds a new remark for a Package() declaration if an initializer list
131 exists, but is shorter than the declared length of the package. Although
132 technically legal, this is probably a coding error and it is seen in the
133 field. ACPICA BZ 815. Lin Ming, Bob Moore.
135 iASL: Fixed a problem where the compiler could fault after the maximum number
136 of errors was reached (200).
138 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
141 ----------------------------------------
142 13 October 2009. Summary of changes for version 20091013:
144 This release is available at www.acpica.org/downloads
146 1) ACPI CA Core Subsystem:
148 Fixed a problem where an Operation Region _REG method could be executed more
149 than once. If a custom address space handler is installed by the host before
150 the "initialize operation regions" phase of the ACPICA initialization, any
151 _REG methods for that address space could be executed twice. This change
152 fixes the problem. ACPICA BZ 427. Lin Ming.
154 Fixed a possible memory leak for the Scope() ASL operator. When the exact
155 invocation of "Scope(\)" is executed (change scope to root), one internal
156 operand object was leaked. Lin Ming.
158 Implemented a run-time repair for the _MAT predefined method. If the _MAT
159 return value is defined as a Field object in the AML, and the field
160 size is less than or equal to the default width of an integer (32 or 64),_MAT
161 can incorrectly return an Integer instead of a Buffer. ACPICA now
162 automatically repairs this problem. ACPICA BZ 810.
164 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
165 "OEM Information" field is often incorrectly returned as an Integer with
166 value zero if the field is not supported by the platform. This is due to an
167 ambiguity in the ACPI specification. The field should always be a string.
168 ACPICA now automatically repairs this problem by returning a NULL string
169 within the returned Package. ACPICA BZ 807.
171 Example Code and Data Size: These are the sizes for the OS-independent
172 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
173 debug version of the code includes the debug output trace mechanism and has a
174 much larger code and data size.
177 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
178 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
180 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
181 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
183 2) iASL Compiler/Disassembler and Tools:
185 Disassembler: Fixed a problem where references to external symbols that
186 contained one or more parent-prefixes (carats) were not handled correctly,
187 possibly causing a fault. ACPICA BZ 806. Lin Ming.
189 Disassembler: Restructured the code so that all functions that handle
190 external symbols are in a single module. One new file is added,
193 AML Debugger: Added a max count argument for the Batch command (which
194 executes multiple predefined methods within the namespace.)
196 iASL: Updated the compiler documentation (User Reference.) Available at
197 http://www.acpica.org/documentation/. ACPICA BZ 750.
199 AcpiXtract: Updated for Lint and other formatting changes. Close all open
202 ----------------------------------------
203 03 September 2009. Summary of changes for version 20090903:
205 1) ACPI CA Core Subsystem:
207 For Windows Vista compatibility, added the automatic execution of an _INI
208 method located at the namespace root (\_INI). This method is executed at
209 table load time. This support is in addition to the automatic execution of
212 Fixed a possible memory leak in the interpreter for AML package objects if
213 the package initializer list is longer than the defined size of the package.
214 This apparently can only happen if the BIOS changes the package size on the
215 fly (seen in a _PSS object), as ASL compilers do not allow this. The
216 interpreter will truncate the package to the defined size (and issue an error
217 message), but previously could leave the extra objects undeleted if they were
218 pre-created during the argument processing (such is the case if the package
219 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
221 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
222 This has been reported in the field. Previously, ACPICA would zero out the
223 buffer/string. Now, the operation is treated as a noop. Provides Windows
224 compatibility. ACPICA BZ 803. Lin Ming.
226 Removed an extraneous error message for ASL constructs of the form
227 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
228 are seen in many BIOSs and are once again treated as NOOPs and no error is
229 emitted when they are encountered. ACPICA BZ 785.
231 Fixed an extraneous warning message if a _DSM reserved method returns a
232 Package object. _DSM can return any type of object, so validation on the
233 return type cannot be performed. ACPICA BZ 802.
235 Example Code and Data Size: These are the sizes for the OS-independent
236 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
237 debug version of the code includes the debug output trace mechanism and has a
238 much larger code and data size.
241 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
242 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
244 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
245 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
247 2) iASL Compiler/Disassembler and Tools:
249 iASL: Fixed a problem with the use of the Alias operator and Resource
250 Templates. The correct alias is now constructed and no error is emitted.
253 iASL: Implemented the -I option to specify additional search directories for
254 include files. Allows multiple additional search paths for include files.
255 Directories are searched in the order specified on the command line (after
256 the local directory is searched.) ACPICA BZ 800.
258 iASL: Fixed a problem where the full pathname for include files was not
259 emitted for warnings/errors. This caused the IDE support to not work
260 properly. ACPICA BZ 765.
262 iASL: Implemented the -@ option to specify a Windows-style response file
263 containing additional command line options. ACPICA BZ 801.
265 AcpiExec: Added support to load multiple AML files simultaneously (such as a
266 DSDT and multiple SSDTs). Also added support for wildcards within the AML
267 pathname. These features allow all machine tables to be easily loaded and
268 debugged together. ACPICA BZ 804.
270 Disassembler: Added missing support for disassembly of HEST table Error Bank
273 ----------------------------------------
274 30 July 2009. Summary of changes for version 20090730:
276 The ACPI 4.0 implementation for ACPICA is complete with this release.
278 1) ACPI CA Core Subsystem:
280 ACPI 4.0: Added header file support for all new and changed ACPI tables.
281 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
282 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
283 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
284 have been some ACPI 4.0 changes to other existing tables. Split the large
285 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
287 ACPI 4.0: Implemented predefined name validation for all new names. There are
288 31 new names in ACPI 4.0. The predefined validation module was split into two
289 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
291 Implemented support for so-called "module-level executable code". This is
292 executable AML code that exists outside of any control method and is intended
293 to be executed at table load time. Although illegal since ACPI 2.0, this type
294 of code still exists and is apparently still being created. Blocks of this
295 code are now detected and executed as intended. Currently, the code blocks
296 must exist under either an If, Else, or While construct; these are the
297 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
299 Implemented an automatic dynamic repair for predefined names that return
300 nested Package objects. This applies to predefined names that are defined to
301 return a variable-length Package of sub-packages. If the number of sub-
302 packages is one, BIOS code is occasionally seen that creates a simple single
303 package with no sub-packages. This code attempts to fix the problem by
304 wrapping a new package object around the existing package. These methods can
305 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
308 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
309 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
312 Fixed a problem with AcpiReset where the reset would silently fail if the
313 register was one of the protected I/O ports. AcpiReset now bypasses the port
314 validation mechanism. This may eventually be driven into the AcpiRead/Write
317 Fixed a regression related to the recent update of the AcpiRead/Write
318 interfaces. A sleep/suspend could fail if the optional PM2 Control register
319 does not exist during an attempt to write the Bus Master Arbitration bit.
320 (However, some hosts already delete the code that writes this bit, and the
321 code may in fact be obsolete at this date.) ACPICA BZ 799.
323 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
324 in succession. ACPICA BZ 795.
326 Example Code and Data Size: These are the sizes for the OS-independent
327 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
328 debug version of the code includes the debug output trace mechanism and has a
329 much larger code and data size.
332 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
333 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
335 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
336 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
338 2) iASL Compiler/Disassembler and Tools:
340 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
341 changes to existing tables. ACPICA BZ 775.
343 ----------------------------------------
344 25 June 2009. Summary of changes for version 20090625:
346 The ACPI 4.0 Specification was released on June 16 and is available at
347 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
348 continue for the next few releases.
350 1) ACPI CA Core Subsystem:
352 ACPI 4.0: Implemented interpreter support for the IPMI operation region
353 address space. Includes support for bi-directional data buffers and an IPMI
354 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
357 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
358 support in both the header files and the disassembler.
360 Completed a major update for the AcpiGetObjectInfo external interface.
362 - Support for variable, unlimited length HID, UID, and CID strings.
363 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
364 - Call the _SxW power methods on behalf of a device object.
365 - Determine if a device is a PCI root bridge.
366 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
367 These changes will require an update to all callers of this interface. See
368 the updated ACPICA Programmer Reference for details. One new source file has
369 been added - utilities/utids.c. ACPICA BZ 368, 780.
371 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
372 transfers. The Value parameter has been extended from 32 bits to 64 bits in
373 order to support new ACPI 4.0 tables. These changes will require an update to
374 all callers of these interfaces. See the ACPICA Programmer Reference for
375 details. ACPICA BZ 768.
377 Fixed several problems with AcpiAttachData. The handler was not invoked when
378 the host node was deleted. The data sub-object was not automatically deleted
379 when the host node was deleted. The interface to the handler had an unused
380 parameter, this was removed. ACPICA BZ 778.
382 Enhanced the function that dumps ACPI table headers. All non-printable
383 characters in the string fields are now replaced with '?' (Signature, OemId,
384 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
385 these fields are occasionally seen in the field. ACPICA BZ 788.
387 Fixed a problem with predefined method repair code where the code that
388 attempts to repair/convert an object of incorrect type is only executed on
389 the first time the predefined method is called. The mechanism that disables
390 warnings on subsequent calls was interfering with the repair mechanism.
393 Fixed a possible memory leak in the predefined validation/repair code when a
394 buffer is automatically converted to an expected string object.
396 Removed obsolete 16-bit files from the distribution and from the current git
397 tree head. ACPICA BZ 776.
399 Example Code and Data Size: These are the sizes for the OS-independent
400 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
401 debug version of the code includes the debug output trace mechanism and has a
402 much larger code and data size.
405 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
406 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
408 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
409 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
411 2) iASL Compiler/Disassembler and Tools:
413 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
414 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
416 ACPI 4.0: iASL - implemented compile-time validation support for all new
417 predefined names and control methods (31 total). ACPICA BZ 769.
419 ----------------------------------------
420 21 May 2009. Summary of changes for version 20090521:
422 1) ACPI CA Core Subsystem:
424 Disabled the preservation of the SCI enable bit in the PM1 control register.
425 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
426 a "preserved" bit - "OSPM always preserves this bit position", section
427 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
428 because the bit needs to be explicitly set by the OS as a workaround. No
429 machines fail if the bit is not preserved. Therefore, ACPICA no longer
430 attempts to preserve this bit.
432 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
433 incorrectly formed _PRT package could cause a fault. Added validation to
434 ensure that each package element is actually a sub-package.
436 Implemented a new interface to install or override a single control method,
437 AcpiInstallMethod. This interface is useful when debugging in order to repair
438 an existing method or to install a missing method without having to override
439 the entire ACPI table. See the ACPICA Programmer Reference for use and
440 examples. Lin Ming, Bob Moore.
442 Fixed several reference count issues with the DdbHandle object that is
443 created from a Load or LoadTable operator. Prevent premature deletion of the
444 object. Also, mark the object as invalid once the table has been unloaded.
445 This is needed because the handle itself may not be deleted after the table
446 unload, depending on whether it has been stored in a named object by the
449 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
450 mutexes of the same sync level are acquired but then not released in strict
451 opposite order, the internally maintained Current Sync Level becomes confused
452 and can cause subsequent execution errors. ACPICA BZ 471.
454 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
455 specification has been changed to make the SyncLevel for mutex objects more
456 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
457 same as the current sync level. This makes more sense than the previous rule
458 (SyncLevel less than or equal). This change updates the code to match the
461 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
462 (local) cache must be locked during all cache object deletions. Andrew
465 Updated the Load operator to use operation region interfaces. This replaces
466 direct memory mapping with region access calls. Now, all region accesses go
467 through the installed region handler as they should.
469 Simplified and optimized the NsGetNextNode function. Reduced parameter count
470 and reduced code for this frequently used function.
472 Example Code and Data Size: These are the sizes for the OS-independent
473 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
474 debug version of the code includes the debug output trace mechanism and has a
475 much larger code and data size.
478 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
479 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
481 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
482 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
484 2) iASL Compiler/Disassembler and Tools:
486 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
487 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
488 after an invalid sub-table ID.
490 ----------------------------------------
491 22 April 2009. Summary of changes for version 20090422:
493 1) ACPI CA Core Subsystem:
495 Fixed a compatibility issue with the recently released I/O port protection
496 mechanism. For windows compatibility, 1) On a port protection violation,
497 simply ignore the request and do not return an exception (allow the control
498 method to continue execution.) 2) If only part of the request overlaps a
499 protected port, read/write the individual ports that are not protected. Linux
502 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
503 breaks into the AML debugger if the debugger is present. This matches the
504 ACPI-defined behavior.
506 Fixed several possible warnings related to the use of the configurable
507 ACPI_THREAD_ID. This type can now be configured as either an integer or a
508 pointer with no warnings. Also fixes several warnings in printf-like
509 statements for the 64-bit build when the type is configured as a pointer.
512 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
513 warning options.) Examples include printf formats, aliasing, unused globals,
514 missing prototypes, missing switch default statements, use of non-ANSI
515 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
516 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
518 Example Code and Data Size: These are the sizes for the OS-independent
519 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
520 debug version of the code includes the debug output trace mechanism and has a
521 much larger code and data size.
524 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
525 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
527 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
528 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
530 2) iASL Compiler/Disassembler and Tools:
532 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
535 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
536 correctly digest Windows/DOS formatted files (with CR/LF).
538 iASL: Added a new option for "quiet mode" (-va) that produces only the
539 compilation summary, not individual errors and warnings. Useful for large
542 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
543 timeout that can be used to detect hang conditions during execution of AML
544 code (includes both internal semaphores and AML-defined mutexes and events.)
546 Added new makefiles for the generation of acpica in a generic unix-like
547 environment. These makefiles are intended to generate the acpica tools and
548 utilities from the original acpica git source tree structure.
550 Test Suites: Updated and cleaned up the documentation files. Updated the
551 copyrights to 2009, affecting all source files. Use the new version of iASL
552 with quiet mode. Increased the number of available semaphores in the Windows
553 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
554 an alternate implementation of the semaphore timeout to allow aslts to
555 execute fully on Cygwin.
557 ----------------------------------------
558 20 March 2009. Summary of changes for version 20090320:
560 1) ACPI CA Core Subsystem:
562 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
563 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
564 namespace walks (readers), but block a dynamic table unload until it can gain
565 exclusive write access to the namespace. This fixes a problem where a table
566 unload could (possibly catastrophically) delete the portion of the namespace
567 that is currently being examined by a walk. Adds a new file, utlock.c, that
568 implements the reader/writer lock mechanism. ACPICA BZ 749.
570 Fixed a regression introduced in version 20090220 where a change to the FADT
571 handling could cause the ACPICA subsystem to access non-existent I/O ports.
573 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
574 FADT can contain both 32-bit and 64-bit versions of these addresses.
575 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
576 versions were valid, but not equal, the 64-bit version was used. This was
577 found to cause some machines to fail. Now, in this case, the 32-bit version
578 is used instead. This now matches the Windows behavior.
580 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
581 compatibility and protects the standard PC I/O ports from access via AML
582 code. Adds a new file, hwvalid.c
584 Fixed a possible extraneous warning message from the FADT support. The
585 message warns of a 32/64 length mismatch between the legacy and GAS
586 definitions for a register.
588 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
589 made obsolete by the port protection mechanism above. It was previously used
590 to validate the entire address range of an operation region, which could be
591 incorrect if the range included illegal ports, but fields within the
592 operation region did not actually access those ports. Validation is now
593 performed on a per-field basis instead of the entire region.
595 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
596 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
597 means a read/modify/write when writing to the register. However, for status
598 registers, writing a one means clear the event. Writing a zero means preserve
599 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
600 and the ACPICA code now simply always writes a zero to the ignored bit.
602 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
603 per the ACPI specification, for the control registers, preserve
604 (read/modify/write) all bits that are defined as either reserved or ignored.
606 Updated the handling of write-only bits in the PM1 A/B Control Registers.
607 When reading the register, zero the write-only bits as per the ACPI spec.
608 ACPICA BZ 443. Lin Ming.
610 Removed "Linux" from the list of supported _OSI strings. Linux no longer
611 wants to reply true to this request. The Windows strings are the only paths
612 through the AML that are tested and known to work properly.
615 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
616 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
618 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
619 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
621 2) iASL Compiler/Disassembler and Tools:
623 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
626 ----------------------------------------
627 20 February 2009. Summary of changes for version 20090220:
629 1) ACPI CA Core Subsystem:
631 Optimized the ACPI register locking. Removed locking for reads from the ACPI
632 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
633 not required when reading the single-bit registers. The
634 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
635 This will improve performance for reads on these registers. ACPICA BZ 760.
637 Fixed the parameter validation for AcpiRead/Write. Now return
638 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
639 the register has an address of zero. Previously, these cases simply returned
640 AE_OK. For optional registers such as PM1B status/enable/control, the caller
641 should check for a valid register address before calling. ACPICA BZ 748.
643 Renamed the external ACPI bit register access functions. Renamed
644 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
645 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
646 Also, restructured the code for these functions by simplifying the code path
647 and condensing duplicate code to reduce code size.
649 Added new functions to transparently handle the possibly split PM1 A/B
650 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
651 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
654 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
655 This function writes both of the PM1 control registers (A/B). These registers
656 are different than the PM1 A/B status and enable registers in that different
657 values can be written to the A/B registers. Most notably, the SLP_TYP bits
658 can be different, as per the values returned from the _Sx predefined methods.
660 Removed an extra register write within AcpiHwClearAcpiStatus. This function
661 was writing an optional PM1B status register twice. The existing call to the
662 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
663 register. ACPICA BZ 751.
665 Split out the PM1 Status registers from the FADT. Added new globals for these
666 registers (A/B), similar to the way the PM1 Enable registers are handled.
667 Instead of overloading the FADT Event Register blocks. This makes the code
668 clearer and less prone to error.
670 Fixed the warning message for when the platform contains too many ACPI tables
671 for the default size of the global root table data structure. The calculation
672 for the truncation value was incorrect.
674 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
675 obsolete macro, since it is now a simple reference to ->common.type. There
676 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
678 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
679 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
680 simply SLEEP_TYPE. ACPICA BZ 754.
682 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
683 function is only needed on 64-bit host operating systems and is thus not
684 included for 32-bit hosts.
686 Debug output: print the input and result for invocations of the _OSI reserved
687 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
688 verbosity of this debug level. Len Brown.
690 Example Code and Data Size: These are the sizes for the OS-independent
691 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
692 debug version of the code includes the debug output trace mechanism and has a
693 much larger code and data size.
696 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
697 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
699 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
700 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
702 2) iASL Compiler/Disassembler and Tools:
704 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
705 various legal performance profiles.
707 ----------------------------------------
708 23 January 2009. Summary of changes for version 20090123:
710 1) ACPI CA Core Subsystem:
712 Added the 2009 copyright to all module headers and signons. This affects
713 virtually every file in the ACPICA core subsystem, the iASL compiler, and
716 Implemented a change to allow the host to override any ACPI table, including
717 dynamically loaded tables. Previously, only the DSDT could be replaced by the
718 host. With this change, the AcpiOsTableOverride interface is called for each
719 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
720 a table is dynamically loaded via the AML Load operator.
722 Updated FADT flag definitions, especially the Boot Architecture flags.
724 Debugger: For the Find command, automatically pad the input ACPI name with
725 underscores if the name is shorter than 4 characters. This enables a match
726 with the actual namespace entry which is itself padded with underscores.
728 Example Code and Data Size: These are the sizes for the OS-independent
729 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
730 debug version of the code includes the debug output trace mechanism and has a
731 much larger code and data size.
734 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
735 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
737 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
738 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
740 2) iASL Compiler/Disassembler and Tools:
742 Fix build error under Bison-2.4.
744 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
745 flags. Now decode all flags, regardless of the FADT version. Flag output
746 includes the FADT version which first defined each flag.
748 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
751 ----------------------------------------
752 04 December 2008. Summary of changes for version 20081204:
754 1) ACPI CA Core Subsystem:
756 The ACPICA Programmer Reference has been completely updated and revamped for
757 this release. This includes updates to the external interfaces, OSL
758 interfaces, the overview sections, and the debugger reference.
760 Several new ACPICA interfaces have been implemented and documented in the
761 programmer reference:
762 AcpiReset - Writes the reset value to the FADT-defined reset register.
763 AcpiDisableAllGpes - Disable all available GPEs.
764 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
765 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
766 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
767 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
768 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
770 Most of the public ACPI hardware-related interfaces have been moved to a new
771 file, components/hardware/hwxface.c
773 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
774 register lengths within the FADT are now used, and the low level ACPI
775 register access no longer hardcodes the ACPI register lengths. Given that
776 there may be some risk in actually trusting the FADT register lengths, a run-
777 time option was added to fall back to the default hardcoded lengths if the
778 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
779 option is set to true for now, and a warning is issued if a suspicious FADT
780 register length is overridden with the default value.
782 Fixed a reference count issue in NsRepairObject. This problem was introduced
783 in version 20081031 as part of a fix to repair Buffer objects within
786 Added semaphore support to the Linux/Unix application OS-services layer
787 (OSL). ACPICA BZ 448. Lin Ming.
789 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
790 be implemented in the OSL, or will binary semaphores be used instead.
792 Example Code and Data Size: These are the sizes for the OS-independent
793 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
794 debug version of the code includes the debug output trace mechanism and has a
795 much larger code and data size.
798 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
799 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
801 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
802 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
804 2) iASL Compiler/Disassembler and Tools:
806 iASL: Completed the '-e' option to include additional ACPI tables in order to
807 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
810 iASL: Removed the "named object in while loop" error. The compiler cannot
811 determine how many times a loop will execute. ACPICA BZ 730.
813 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
816 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
818 ----------------------------------------
819 31 October 2008. Summary of changes for version 20081031:
821 1) ACPI CA Core Subsystem:
823 Restructured the ACPICA header files into public/private. acpi.h now includes
824 only the "public" acpica headers. All other acpica headers are "private" and
825 should not be included by acpica users. One new file, accommon.h is used to
826 include the commonly used private headers for acpica code generation. Future
827 plans include moving all private headers to a new subdirectory.
829 Implemented an automatic Buffer->String return value conversion for
830 predefined ACPI methods. For these methods (such as _BIF), added automatic
831 conversion for return objects that are required to be a String, but a Buffer
832 was found instead. This can happen when reading string battery data from an
833 operation region, because it used to be difficult to convert the data from
834 buffer to string from within the ASL. Ensures that the host OS is provided
835 with a valid null-terminated string. Linux BZ 11822.
837 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
838 into two: one for the 32-bit vector, another for the 64-bit vector. This is
839 required because the host OS must setup the wake much differently for each
840 vector (real vs. protected mode, etc.) and the interface itself should not be
841 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
842 interface, as it served no purpose (only the firmware reads the vector, OS
843 only writes the vector.) ACPICA BZ 731.
845 Implemented a mechanism to escape infinite AML While() loops. Added a loop
846 counter to force exit from AML While loops if the count becomes too large.
847 This can occur in poorly written AML when the hardware does not respond
848 within a while loop and the loop does not implement a timeout. The maximum
849 loop count is configurable. A new exception code is returned when a loop is
850 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
852 Optimized the execution of AML While loops. Previously, a control state
853 object was allocated and freed for each execution of the loop. The
854 optimization is to simply reuse the control state for each iteration. This
855 speeds up the raw loop execution time by about 5%.
857 Enhanced the implicit return mechanism. For Windows compatibility, return an
858 implicit integer of value zero for methods that contain no executable code.
859 Such methods are seen in the field as stubs (presumably), and can cause
860 drivers to fail if they expect a return value. Lin Ming.
862 Allow multiple backslashes as root prefixes in namepaths. In a fully
863 qualified namepath, allow multiple backslash prefixes. This can happen (and
864 is seen in the field) because of the use of a double-backslash in strings
865 (since backslash is the escape character) causing confusion. ACPICA BZ 739
868 Emit a warning if two different FACS or DSDT tables are discovered in the
869 FADT. Checks if there are two valid but different addresses for the FACS and
870 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
872 Consolidated the method argument count validation code. Merged the code that
873 validates control method argument counts into the predefined validation
874 module. Eliminates possible multiple warnings for incorrect argument counts.
876 Implemented ACPICA example code. Includes code for ACPICA initialization,
877 handler installation, and calling a control method. Available at
878 source/tools/examples.
880 Added a global pointer for FACS table to simplify internal FACS access. Use
881 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
882 This simplifies the code for the Global Lock and the Firmware Waking
885 Example Code and Data Size: These are the sizes for the OS-independent
886 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
887 debug version of the code includes the debug output trace mechanism and has a
888 much larger code and data size.
891 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
892 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
894 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
895 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
897 2) iASL Compiler/Disassembler and Tools:
899 iASL: Improved disassembly of external method calls. Added the -e option to
900 allow the inclusion of additional ACPI tables to help with the disassembly of
901 method invocations and the generation of external declarations during the
902 disassembly. Certain external method invocations cannot be disassembled
903 properly without the actual declaration of the method. Use the -e option to
904 include the table where the external method(s) are actually declared. Most
905 useful for disassembling SSDTs that make method calls back to the master
906 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
907 -e dsdt.aml ssdt1.aml
909 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
910 problem where the use of an alias within a namepath would result in a not
911 found error or cause the compiler to fault. Also now allows forward
912 references from the Alias operator itself. ACPICA BZ 738.
914 ----------------------------------------
915 26 September 2008. Summary of changes for version 20080926:
917 1) ACPI CA Core Subsystem:
919 Designed and implemented a mechanism to validate predefined ACPI methods and
920 objects. This code validates the predefined ACPI objects (objects whose names
921 start with underscore) that appear in the namespace, at the time they are
922 evaluated. The argument count and the type of the returned object are
923 validated against the ACPI specification. The purpose of this validation is
924 to detect problems with the BIOS-implemented predefined ACPI objects before
925 the results are returned to the ACPI-related drivers. Future enhancements may
926 include actual repair of incorrect return objects where possible. Two new
927 files are nspredef.c and acpredef.h.
929 Fixed a fault in the AML parser if a memory allocation fails during the Op
930 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
932 Fixed an issue with implicit return compatibility. This change improves the
933 implicit return mechanism to be more compatible with the MS interpreter. Lin
936 Implemented support for zero-length buffer-to-string conversions. Allow zero
937 length strings during interpreter buffer-to-string conversions. For example,
938 during the ToDecimalString and ToHexString operators, as well as implicit
939 conversions. Fiodor Suietov, ACPICA BZ 585.
941 Fixed two possible memory leaks in the error exit paths of
942 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
943 similar in that they use a stack of state objects in order to eliminate
944 recursion. The stack must be fully unwound and deallocated if an error
945 occurs. Lin Ming. ACPICA BZ 383.
947 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
948 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
951 Removed the obsolete version number in module headers. Removed the
952 "$Revision" number that appeared in each module header. This version number
953 was useful under SourceSafe and CVS, but has no meaning under git. It is not
954 only incorrect, it could also be misleading.
956 Example Code and Data Size: These are the sizes for the OS-independent
957 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
958 debug version of the code includes the debug output trace mechanism and has a
959 much larger code and data size.
962 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
963 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
965 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
966 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
968 ----------------------------------------
969 29 August 2008. Summary of changes for version 20080829:
971 1) ACPI CA Core Subsystem:
973 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
974 Reference. Changes include the elimination of cheating on the Object field
975 for the DdbHandle subtype, addition of a reference class field to
976 differentiate the various reference types (instead of an AML opcode), and the
977 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
979 Reduce an error to a warning for an incorrect method argument count.
980 Previously aborted with an error if too few arguments were passed to a
981 control method via the external ACPICA interface. Now issue a warning instead
982 and continue. Handles the case where the method inadvertently declares too
983 many arguments, but does not actually use the extra ones. Applies mainly to
984 the predefined methods. Lin Ming. Linux BZ 11032.
986 Disallow the evaluation of named object types with no intrinsic value. Return
987 AE_TYPE for objects that have no value and therefore evaluation is undefined:
988 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
989 these types were allowed, but an exception would be generated at some point
990 during the evaluation. Now, the error is generated up front.
992 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
993 (nsnames.c). Fixes a leak in the error exit path.
995 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
996 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
997 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
1000 Removed obsolete and/or unused exception codes from the acexcep.h header.
1001 There is the possibility that certain device drivers may be affected if they
1002 use any of these exceptions.
1004 The ACPICA documentation has been added to the public git source tree, under
1005 acpica/documents. Included are the ACPICA programmer reference, the iASL
1006 compiler reference, and the changes.txt release logfile.
1008 Example Code and Data Size: These are the sizes for the OS-independent
1009 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1010 debug version of the code includes the debug output trace mechanism and has a
1011 much larger code and data size.
1014 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1015 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1017 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1018 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1020 2) iASL Compiler/Disassembler and Tools:
1022 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
1023 defines _SCP with 3 arguments. Previous versions defined it with only 1
1024 argument. iASL now allows both definitions.
1026 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
1027 length subtables when disassembling ACPI tables. Also fixed a couple of
1028 errors where a full 16-bit table type field was not extracted from the input
1031 acpisrc: Improve comment counting mechanism for generating source code
1032 statistics. Count first and last lines of multi-line comments as whitespace,
1033 not comment lines. Handle Linux legal header in addition to standard acpica
1036 ----------------------------------------
1038 29 July 2008. Summary of changes for version 20080729:
1040 This release is available at http://acpica.org/downloads
1041 Direct git access via http://www.acpica.org/repos/acpica.git
1043 1) ACPI CA Core Subsystem:
1045 Fix a possible deadlock in the GPE dispatch. Remove call to
1046 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
1047 to acquire the GPE lock but can deadlock since the GPE lock is already held
1048 at dispatch time. This code was introduced in version 20060831 as a response
1049 to Linux BZ 6881 and has since been removed from Linux.
1051 Add a function to dereference returned reference objects. Examines the return
1052 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
1053 automatically dereferenced in an attempt to return something useful (these
1054 reference types cannot be converted into an external ACPI_OBJECT.) Provides
1055 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
1057 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
1058 subtables for the MADT and one new subtable for the SRAT. Includes
1059 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
1060 Specification, June 2008.
1062 Additional error checking for pathname utilities. Add error check after all
1063 calls to AcpiNsGetPathnameLength. Add status return from
1064 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
1065 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
1067 Return status from the global init function AcpiUtGlobalInitialize. This is
1068 used by both the kernel subsystem and the utilities such as iASL compiler.
1069 The function could possibly fail when the caches are initialized. Yang Yi.
1071 Add a function to decode reference object types to strings. Created for
1072 improved error messages.
1074 Improve object conversion error messages. Better error messages during object
1075 conversion from internal to the external ACPI_OBJECT. Used for external calls
1076 to AcpiEvaluateObject.
1078 Example Code and Data Size: These are the sizes for the OS-independent
1079 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1080 debug version of the code includes the debug output trace mechanism and has a
1081 much larger code and data size.
1084 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1085 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1087 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1088 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1090 2) iASL Compiler/Disassembler and Tools:
1092 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
1093 introduced in version 20080701. If the object being evaluated (via execute
1094 command) is not a method, the debugger can hang while trying to obtain non-
1095 existent parameters.
1097 iASL: relax error for using reserved "_T_x" identifiers. These names can
1098 appear in a disassembled ASL file if they were emitted by the original
1099 compiler. Instead of issuing an error or warning and forcing the user to
1100 manually change these names, issue a remark instead.
1102 iASL: error if named object created in while loop. Emit an error if any named
1103 object is created within a While loop. If allowed, this code will generate a
1104 run-time error on the second iteration of the loop when an attempt is made to
1105 create the same named object twice. ACPICA bugzilla 730.
1107 iASL: Support absolute pathnames for include files. Add support for absolute
1108 pathnames within the Include operator. previously, only relative pathnames
1111 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
1112 The ACPI spec requires one interrupt minimum. BZ 423
1114 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
1115 Handles the case for the Interrupt Resource Descriptor where
1116 the ResourceSource argument is omitted but ResourceSourceIndex
1117 is present. Now leave room for the Index. BZ 426
1119 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
1120 where an error message is emitted if the target does not exist. BZ 516
1122 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
1123 (get ACPI tables on Windows). This was apparently broken in version 20070919.
1125 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
1126 the EOF happens immediately after the last table in the input file. Print
1127 completion message. Previously, no message was displayed in this case.
1129 ----------------------------------------
1130 01 July 2008. Summary of changes for version 20080701:
1132 This release is available at http://acpica.org/downloads
1133 Direct git access via http://www.acpica.org/repos/acpica.git
1135 0) Git source tree / acpica.org
1137 Fixed a problem where a git-clone from http would not transfer the entire
1140 1) ACPI CA Core Subsystem:
1142 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
1143 enable bit. Now performs a read-change-write of the enable register instead
1144 of simply writing out the cached enable mask. This will prevent inadvertent
1145 enabling of GPEs if a rogue GPE is received during initialization (before GPE
1146 handlers are installed.)
1148 Implemented a copy for dynamically loaded tables. Previously, dynamically
1149 loaded tables were simply mapped - but on some machines this memory is
1150 corrupted after suspend. Now copy the table to a local buffer. For the
1151 OpRegion case, added checksum verify. Use the table length from the table
1152 header, not the region length. For the Buffer case, use the table length
1153 also. Dennis Noordsij, Bob Moore. BZ 10734
1155 Fixed a problem where the same ACPI table could not be dynamically loaded and
1156 unloaded more than once. Without this change, a table cannot be loaded again
1157 once it has been loaded/unloaded one time. The current mechanism does not
1158 unregister a table upon an unload. During a load, if the same table is found,
1159 this no longer returns an exception. BZ 722
1161 Fixed a problem where the wrong descriptor length was calculated for the
1162 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
1163 are calculated as 12 bytes long, but the actual length in the internal
1164 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
1165 by Linn Crosetto. BZ 728
1167 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
1168 by Load() did not have its reference count decremented during unload, leading
1169 to a memory leak. Lin Ming. BZ 727
1171 Fixed a possible memory leak when deleting thermal/processor objects. Any
1172 associated notify handlers (and objects) were not being deleted. Fiodor
1175 Fixed the ordering of the ASCII names in the global mutex table to match the
1176 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
1177 Vegard Nossum. BZ 726
1179 Enhanced the AcpiGetObjectInfo interface to return the number of required
1180 arguments if the object is a control method. Added this call to the debugger
1181 so the proper number of default arguments are passed to a method. This
1182 prevents a warning when executing methods from AcpiExec.
1184 Added a check for an invalid handle in AcpiGetObjectInfo. Return
1185 AE_BAD_PARAMETER if input handle is invalid. BZ 474
1187 Fixed an extraneous warning from exconfig.c on the 64-bit build.
1189 Example Code and Data Size: These are the sizes for the OS-independent
1190 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1191 debug version of the code includes the debug output trace mechanism and has a
1192 much larger code and data size.
1195 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1196 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1198 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1199 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1201 2) iASL Compiler/Disassembler and Tools:
1203 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
1204 resource descriptor names.
1206 iASL: Detect invalid ASCII characters in input (windows version). Removed the
1207 "-CF" flag from the flex compile, enables correct detection of non-ASCII
1208 characters in the input. BZ 441
1210 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
1211 "result of operation not used" warning when the DDB handle returned from
1212 LoadTable is not used. The warning is not needed. BZ 590
1214 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
1215 pass address of table to the AML. Added option to disable OpRegion simulation
1216 to allow creation of an OpRegion with a real address that was passed to _CFG.
1217 All of this allows testing of the Load and Unload operators from AcpiExec.
1219 Debugger: update tables command for unloaded tables. Handle unloaded tables
1220 and use the standard table header output routine.
1222 ----------------------------------------
1223 09 June 2008. Summary of changes for version 20080609:
1225 1) ACPI CA Core Subsystem:
1227 Implemented a workaround for reversed _PRT entries. A significant number of
1228 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
1229 change dynamically detects and repairs this problem. Provides compatibility
1230 with MS ACPI. BZ 6859
1232 Simplified the internal ACPI hardware interfaces to eliminate the locking
1233 flag parameter from Register Read/Write. Added a new external interface,
1234 AcpiGetRegisterUnlocked.
1236 Fixed a problem where the invocation of a GPE control method could hang. This
1237 was a regression introduced in 20080514. The new method argument count
1238 validation mechanism can enter an infinite loop when a GPE method is
1239 dispatched. Problem fixed by removing the obsolete code that passed GPE block
1240 information to the notify handler via the control method parameter pointer.
1242 Fixed a problem where the _SST execution status was incorrectly returned to
1243 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
1244 20080514. _SST is optional and a NOT_FOUND exception should never be
1247 Fixed a problem where a deleted object could be accessed from within the AML
1248 parser. This was a regression introduced in version 20080123 as a fix for the
1249 Unload operator. Lin Ming. BZ 10669
1251 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
1252 and eliminated the use of a negative index in a loop. Operands are now
1253 displayed in the correct order, not backwards. This also fixes a regression
1254 introduced in 20080514 on 64-bit systems where the elimination of
1255 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
1257 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
1258 path did not delete a locally allocated structure.
1260 Updated definitions for the DMAR and SRAT tables to synchronize with the
1261 current specifications. Includes disassembler support.
1263 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
1264 loop termination value was used. Loop terminated on iteration early, missing
1265 one mutex. Linn Crosetto
1267 Example Code and Data Size: These are the sizes for the OS-independent
1268 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1269 debug version of the code includes the debug output trace mechanism and has a
1270 much larger code and data size.
1273 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1274 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1276 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1277 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1279 2) iASL Compiler/Disassembler and Tools:
1281 Disassembler: Implemented support for EisaId() within _CID objects. Now
1282 disassemble integer _CID objects back to EisaId invocations, including
1283 multiple integers within _CID packages. Includes single-step support for
1286 Disassembler: Added support for DMAR and SRAT table definition changes.
1288 ----------------------------------------
1289 14 May 2008. Summary of changes for version 20080514:
1291 1) ACPI CA Core Subsystem:
1293 Fixed a problem where GPEs were enabled too early during the ACPICA
1294 initialization. This could lead to "handler not installed" errors on some
1295 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
1296 ensures that all operation regions and devices throughout the namespace have
1297 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
1299 Implemented a change to the enter sleep code. Moved execution of the _GTS
1300 method to just before setting sleep enable bit. The execution was moved from
1301 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
1302 immediately before the SLP_EN bit is set, as per the ACPI specification.
1305 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
1306 the GPE, even if ACPICA thinks that that it is already disabled. It is
1307 possible that the AML or some other code has enabled the GPE unbeknownst to
1310 Fixed a problem with the Field operator where zero-length fields would return
1311 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
1312 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
1314 Implemented a fix for the Load operator, now load the table at the namespace
1315 root. This reverts a change introduced in version 20071019. The table is now
1316 loaded at the namespace root even though this goes against the ACPI
1317 specification. This provides compatibility with other ACPI implementations.
1318 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
1320 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
1321 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
1322 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
1323 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
1324 signatures, ACPICA must be compatible. BZ 10454.
1326 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
1327 fields to the exception string arrays to eliminate a -1 subtraction on the
1330 Updated the debug tracking macros to reduce overall code and data size.
1331 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
1332 instead of pointers to static strings. Jan Beulich and Bob Moore.
1334 Implemented argument count checking in control method invocation via
1335 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
1336 many. This applies only to extern programmatic control method execution, not
1337 method-to-method calls within the AML. Lin Ming.
1339 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
1340 longer needed, especially with the removal of 16-bit support. It was replaced
1341 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
1342 32/64-bit platforms is required.
1344 Added the C const qualifier for appropriate string constants -- mostly
1345 MODULE_NAME and printf format strings. Jan Beulich.
1347 Example Code and Data Size: These are the sizes for the OS-independent
1348 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1349 debug version of the code includes the debug output trace mechanism and has a
1350 much larger code and data size.
1353 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1354 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1356 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1357 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1359 2) iASL Compiler/Disassembler and Tools:
1361 Implemented ACPI table revision ID validation in the disassembler. Zero is
1362 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
1363 means 32-bit and this is unusual. 2 or greater is 64-bit.
1365 ----------------------------------------
1366 21 March 2008. Summary of changes for version 20080321:
1368 1) ACPI CA Core Subsystem:
1370 Implemented an additional change to the GPE support in order to suppress
1371 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
1372 disable incoming GPEs that are neither enabled nor disabled -- meaning that
1373 the GPE is unknown to the system. This should prevent future interrupt floods
1374 from that GPE. BZ 6217 (Zhang Rui)
1376 Fixed a problem where NULL package elements were not returned to the
1377 AcpiEvaluateObject interface correctly. The element was simply ignored
1378 instead of returning a NULL ACPI_OBJECT package element, potentially causing
1379 a buffer overflow and/or confusing the caller who expected a fixed number of
1380 elements. BZ 10132 (Lin Ming, Bob Moore)
1382 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
1383 Qword), Field, BankField, and IndexField operators when invoked from inside
1384 an executing control method. In this case, these operators created namespace
1385 nodes that were incorrectly left marked as permanent nodes instead of
1386 temporary nodes. This could cause a problem if there is race condition
1387 between an exiting control method and a running namespace walk. (Reported by
1390 Fixed a problem where the CreateField and CreateXXXField operators would
1391 incorrectly allow duplicate names (the name of the field) with no exception
1394 Implemented several changes for Notify handling. Added support for new Notify
1395 values (ACPI 2.0+) and improved the Notify debug output. Notify on
1396 PowerResource objects is no longer allowed, as per the ACPI specification.
1397 (Bob Moore, Zhang Rui)
1399 All Reference Objects returned via the AcpiEvaluateObject interface are now
1400 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
1401 NULL objects - either NULL package elements or unresolved named references.
1403 Fixed a problem where an extraneous debug message was produced for package
1404 objects (when debugging enabled). The message "Package List length larger
1405 than NumElements count" is now produced in the correct case, and is now an
1406 error message rather than a debug message. Added a debug message for the
1407 opposite case, where NumElements is larger than the Package List (the package
1408 will be padded out with NULL elements as per the ACPI spec.)
1410 Implemented several improvements for the output of the ASL "Debug" object to
1411 clarify and keep all data for a given object on one output line.
1413 Fixed two size calculation issues with the variable-length Start Dependent
1414 resource descriptor.
1416 Example Code and Data Size: These are the sizes for the OS-independent
1417 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1418 debug version of the code includes the debug output trace mechanism and has
1419 a much larger code and data size.
1422 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1423 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1425 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1426 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1428 2) iASL Compiler/Disassembler and Tools:
1430 Fixed a problem with the use of the Switch operator where execution of the
1431 containing method by multiple concurrent threads could cause an
1432 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
1433 actual Switch opcode, it must be simulated with local named temporary
1434 variables and if/else pairs. The solution chosen was to mark any method that
1435 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
1437 ----------------------------------------
1438 13 February 2008. Summary of changes for version 20080213:
1440 1) ACPI CA Core Subsystem:
1442 Implemented another MS compatibility design change for GPE/Notify handling.
1443 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
1444 complete first. It is expected that the OSL will queue the enable request
1445 behind all pending notify requests (may require changes to the local host OSL
1446 in AcpiOsExecute). Alexey Starikovskiy.
1448 Fixed a problem where buffer and package objects passed as arguments to a
1449 control method via the external AcpiEvaluateObject interface could cause an
1450 AE_AML_INTERNAL exception depending on the order and type of operators
1451 executed by the target control method.
1453 Fixed a problem where resource descriptor size optimization could cause a
1454 problem when a _CRS resource template is passed to a _SRS method. The _SRS
1455 resource template must use the same descriptors (with the same size) as
1456 returned from _CRS. This change affects the following resource descriptors:
1457 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
1459 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
1460 objects did not perform an implicit conversion as it should. These types must
1461 retain their initial type permanently as per the ACPI specification. However,
1462 a CopyObject to all other object types should not perform an implicit
1463 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
1465 Fixed a problem with the AcpiGetDevices interface where the mechanism to
1466 match device CIDs did not examine the entire list of available CIDs, but
1467 instead aborted on the first non-matching CID. Andrew Patterson.
1469 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
1470 inadvertently changed to return a 16-bit value instead of a 32-bit value,
1471 truncating the upper dword of a 64-bit value. This macro is only used to
1472 display debug output, so no incorrect calculations were made. Also,
1473 reimplemented the macro so that a 64-bit shift is not performed by
1474 inefficient compilers.
1476 Added missing va_end statements that should correspond with each va_start
1479 Example Code and Data Size: These are the sizes for the OS-independent
1480 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1481 debug version of the code includes the debug output trace mechanism and has
1482 a much larger code and data size.
1485 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1486 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1488 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1489 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1491 2) iASL Compiler/Disassembler and Tools:
1493 Implemented full disassembler support for the following new ACPI tables:
1494 BERT, EINJ, and ERST. Implemented partial disassembler support for the
1495 complicated HEST table. These tables support the Windows Hardware Error
1496 Architecture (WHEA).
1498 ----------------------------------------
1499 23 January 2008. Summary of changes for version 20080123:
1501 1) ACPI CA Core Subsystem:
1503 Added the 2008 copyright to all module headers and signons. This affects
1504 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1505 the tools/utilities.
1507 Fixed a problem with the SizeOf operator when used with Package and Buffer
1508 objects. These objects have deferred execution for some arguments, and the
1509 execution is now completed before the SizeOf is executed. This problem caused
1510 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
1513 Implemented an enhancement to the interpreter "slack mode". In the absence of
1514 an explicit return or an implicitly returned object from the last executed
1515 opcode, a control method will now implicitly return an integer of value 0 for
1516 Microsoft compatibility. (Lin Ming) BZ 392
1518 Fixed a problem with the Load operator where an exception was not returned in
1519 the case where the table is already loaded. (Lin Ming) BZ 463
1521 Implemented support for the use of DDBHandles as an Indexed Reference, as per
1522 the ACPI spec. (Lin Ming) BZ 486
1524 Implemented support for UserTerm (Method invocation) for the Unload operator
1525 as per the ACPI spec. (Lin Ming) BZ 580
1527 Fixed a problem with the LoadTable operator where the OemId and OemTableId
1528 input strings could cause unexpected failures if they were shorter than the
1529 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
1531 Implemented support for UserTerm (Method invocation) for the Unload operator
1532 as per the ACPI spec. (Lin Ming) BZ 580
1534 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
1535 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
1537 Example Code and Data Size: These are the sizes for the OS-independent
1538 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1539 debug version of the code includes the debug output trace mechanism and has
1540 a much larger code and data size.
1543 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1544 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1546 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1547 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1549 2) iASL Compiler/Disassembler and Tools:
1551 Implemented support in the disassembler for checksum validation on incoming
1552 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
1553 header dump at the start of the disassembly.
1555 Implemented additional debugging information in the namespace listing file
1556 created during compilation. In addition to the namespace hierarchy, the full
1557 pathname to each namespace object is displayed.
1559 Fixed a problem with the disassembler where invalid ACPI tables could cause
1560 faults or infinite loops.
1562 Fixed an unexpected parse error when using the optional "parameter types"
1563 list in a control method declaration. (Lin Ming) BZ 397
1565 Fixed a problem where two External declarations with the same name did not
1566 cause an error (Lin Ming) BZ 509
1568 Implemented support for full TermArgs (adding Argx, Localx and method
1569 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
1572 ----------------------------------------
1573 19 December 2007. Summary of changes for version 20071219:
1575 1) ACPI CA Core Subsystem:
1577 Implemented full support for deferred execution for the TermArg string
1578 arguments for DataTableRegion. This enables forward references and full
1579 operand resolution for the three string arguments. Similar to OperationRegion
1580 deferred argument execution.) Lin Ming. BZ 430
1582 Implemented full argument resolution support for the BankValue argument to
1583 BankField. Previously, only constants were supported, now any TermArg may be
1584 used. Lin Ming BZ 387, 393
1586 Fixed a problem with AcpiGetDevices where the search of a branch of the
1587 device tree could be terminated prematurely. In accordance with the ACPI
1588 specification, the search down the current branch is terminated if a device
1589 is both not present and not functional (instead of just not present.) Yakui
1592 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
1593 the underlying AML code changed the GPE enable registers. Now, any unknown
1594 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
1595 instead of simply ignored. Rui Zhang.
1597 Fixed a problem with Index Fields where the Index register was incorrectly
1598 limited to a maximum of 32 bits. Now any size may be used.
1600 Fixed a couple memory leaks associated with "implicit return" objects when
1601 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
1603 Example Code and Data Size: These are the sizes for the OS-independent
1604 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1605 debug version of the code includes the debug output trace mechanism and has
1606 a much larger code and data size.
1609 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1610 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1612 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1613 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1615 ----------------------------------------
1616 14 November 2007. Summary of changes for version 20071114:
1618 1) ACPI CA Core Subsystem:
1620 Implemented event counters for each of the Fixed Events, the ACPI SCI
1621 (interrupt) itself, and control methods executed. Named
1622 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
1623 should be useful for debugging and statistics.
1625 Implemented a new external interface, AcpiGetStatistics, to retrieve the
1626 contents of the various event counters. Returns the current values for
1627 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
1628 AcpiMethodCount. The interface can be expanded in the future if new counters
1629 are added. Device drivers should use this interface rather than access the
1632 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
1633 the ShortDivide function worked incorrectly, causing problems with the BCD
1634 functions with large input values. A truncation from 64-bit to 32-bit
1635 inadvertently occurred. Internal BZ 435. Lin Ming
1637 Fixed a problem with Index references passed as method arguments. References
1638 passed as arguments to control methods were dereferenced immediately (before
1639 control was passed to the called method). The references are now correctly
1640 passed directly to the called method. BZ 5389. Lin Ming
1642 Fixed a problem with CopyObject used in conjunction with the Index operator.
1643 The reference was incorrectly dereferenced before the copy. The reference is
1644 now correctly copied. BZ 5391. Lin Ming
1646 Fixed a problem with Control Method references within Package objects. These
1647 references are now correctly generated. This completes the package
1648 construction overhaul that began in version 20071019.
1650 Example Code and Data Size: These are the sizes for the OS-independent
1651 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1652 debug version of the code includes the debug output trace mechanism and has
1653 a much larger code and data size.
1656 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1657 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1659 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1660 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1663 2) iASL Compiler/Disassembler and Tools:
1665 The AcpiExec utility now installs handlers for all of the predefined
1666 Operation Region types. New types supported are: PCI_Config, CMOS, and
1669 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
1670 bit) address fields for the DSDT and FACS within the FADT were not being
1671 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
1674 ----------------------------------------
1675 19 October 2007. Summary of changes for version 20071019:
1677 1) ACPI CA Core Subsystem:
1679 Fixed a problem with the Alias operator when the target of the alias is a
1680 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
1681 Processor, and ThermalZone. In these cases, any children of the original
1682 operator could not be accessed via the alias, potentially causing unexpected
1683 AE_NOT_FOUND exceptions. (BZ 9067)
1685 Fixed a problem with the Package operator where all named references were
1686 created as object references and left otherwise unresolved. According to the
1687 ACPI specification, a Package can only contain Data Objects or references to
1688 control methods. The implication is that named references to Data Objects
1689 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
1690 immediately upon package creation. This is the approach taken with this
1691 change. References to all other named objects (Methods, Devices, Scopes,
1692 etc.) are all now properly created as reference objects. (BZ 5328)
1694 Reverted a change to Notify handling that was introduced in version
1695 20070508. This version changed the Notify handling from asynchronous to
1696 fully synchronous (Device driver Notify handling with respect to the Notify
1697 ASL operator). It was found that this change caused more problems than it
1698 solved and was removed by most users.
1700 Fixed a problem with the Increment and Decrement operators where the type of
1701 the target object could be unexpectedly and incorrectly changed. (BZ 353)
1704 Fixed a problem with the Load and LoadTable operators where the table
1705 location within the namespace was ignored. Instead, the table was always
1706 loaded into the root or current scope. Lin Ming.
1708 Fixed a problem with the Load operator when loading a table from a buffer
1709 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
1711 Fixed a problem with the Debug object where a store of a DdbHandle reference
1712 object to the Debug object could cause a fault.
1714 Added a table checksum verification for the Load operator, in the case where
1715 the load is from a buffer. (BZ 578).
1717 Implemented additional parameter validation for the LoadTable operator. The
1718 length of the input strings SignatureString, OemIdString, and OemTableId are
1719 now checked for maximum lengths. (BZ 582) Lin Ming.
1721 Example Code and Data Size: These are the sizes for the OS-independent
1722 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1723 debug version of the code includes the debug output trace mechanism and has
1724 a much larger code and data size.
1727 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1728 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1730 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1731 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1734 2) iASL Compiler/Disassembler:
1736 Fixed a problem where if a single file was specified and the file did not
1737 exist, no error message was emitted. (Introduced with wildcard support in
1740 ----------------------------------------
1741 19 September 2007. Summary of changes for version 20070919:
1743 1) ACPI CA Core Subsystem:
1745 Designed and implemented new external interfaces to install and remove
1746 handlers for ACPI table-related events. Current events that are defined are
1747 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
1748 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
1749 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
1751 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
1752 (acpi_serialized option on Linux) could cause some systems to hang during
1753 initialization. (Bob Moore) BZ 8171
1755 Fixed a problem where objects of certain types (Device, ThermalZone,
1756 Processor, PowerResource) can be not found if they are declared and
1757 referenced from within the same control method (Lin Ming) BZ 341
1759 Example Code and Data Size: These are the sizes for the OS-independent
1760 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1761 debug version of the code includes the debug output trace mechanism and has
1762 a much larger code and data size.
1765 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1766 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1768 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1769 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1772 2) iASL Compiler/Disassembler:
1774 Implemented support to allow multiple files to be compiled/disassembled in a
1775 single invocation. This includes command line wildcard support for both the
1776 Windows and Unix versions of the compiler. This feature simplifies the
1777 disassembly and compilation of multiple ACPI tables in a single directory.
1779 ----------------------------------------
1780 08 May 2007. Summary of changes for version 20070508:
1782 1) ACPI CA Core Subsystem:
1784 Implemented a Microsoft compatibility design change for the handling of the
1785 Notify AML operator. Previously, notify handlers were dispatched and
1786 executed completely asynchronously in a deferred thread. The new design
1787 still executes the notify handlers in a different thread, but the original
1788 thread that executed the Notify() now waits at a synchronization point for
1789 the notify handler to complete. Some machines depend on a synchronous Notify
1790 operator in order to operate correctly.
1792 Implemented support to allow Package objects to be passed as method
1793 arguments to the external AcpiEvaluateObject interface. Previously, this
1794 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
1795 implemented since there were no reserved control methods that required it
1798 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
1799 contained invalid non-zero values in reserved fields could cause later
1800 failures because these fields have meaning in later revisions of the FADT.
1801 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
1802 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
1804 Fixed a problem where the Global Lock handle was not properly updated if a
1805 thread that acquired the Global Lock via executing AML code then attempted
1806 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
1809 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
1810 could be corrupted if the interrupt being removed was at the head of the
1811 list. Reported by Linn Crosetto.
1813 Example Code and Data Size: These are the sizes for the OS-independent
1814 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1815 debug version of the code includes the debug output trace mechanism and has
1816 a much larger code and data size.
1819 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1820 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1822 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1823 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1825 ----------------------------------------
1826 20 March 2007. Summary of changes for version 20070320:
1828 1) ACPI CA Core Subsystem:
1830 Implemented a change to the order of interpretation and evaluation of AML
1831 operand objects within the AML interpreter. The interpreter now evaluates
1832 operands in the order that they appear in the AML stream (and the
1833 corresponding ASL code), instead of in the reverse order (after the entire
1834 operand list has been parsed). The previous behavior caused several subtle
1835 incompatibilities with the Microsoft AML interpreter as well as being
1836 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
1838 Implemented a change to the ACPI Global Lock support. All interfaces to the
1839 global lock now allow the same thread to acquire the lock multiple times.
1840 This affects the AcpiAcquireGlobalLock external interface to the global lock
1841 as well as the internal use of the global lock to support AML fields -- a
1842 control method that is holding the global lock can now simultaneously access
1843 AML fields that require global lock protection. Previously, in both cases,
1844 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
1845 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
1846 Controller. There is no change to the behavior of the AML Acquire operator,
1847 as this can already be used to acquire a mutex multiple times by the same
1848 thread. BZ 8066. With assistance from Alexey Starikovskiy.
1850 Fixed a problem where invalid objects could be referenced in the AML
1851 Interpreter after error conditions. During operand evaluation, ensure that
1852 the internal "Return Object" field is cleared on error and only valid
1853 pointers are stored there. Caused occasional access to deleted objects that
1854 resulted in "large reference count" warning messages. Valery Podrezov.
1856 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
1857 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
1860 Fixed an internal problem with the handling of result objects on the
1861 interpreter result stack. BZ 7872. Valery Podrezov.
1863 Removed obsolete code that handled the case where AML_NAME_OP is the target
1864 of a reference (Reference.Opcode). This code was no longer necessary. BZ
1865 7874. Valery Podrezov.
1867 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
1868 remnant from the previously discontinued 16-bit support.
1870 Example Code and Data Size: These are the sizes for the OS-independent
1871 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1872 debug version of the code includes the debug output trace mechanism and has
1873 a much larger code and data size.
1876 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1877 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1879 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1880 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1882 ----------------------------------------
1883 26 January 2007. Summary of changes for version 20070126:
1885 1) ACPI CA Core Subsystem:
1887 Added the 2007 copyright to all module headers and signons. This affects
1888 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1891 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
1892 during a table load. A bad pointer was passed in the case where the DSDT is
1893 overridden, causing a fault in this case.
1895 Example Code and Data Size: These are the sizes for the OS-independent
1896 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1897 debug version of the code includes the debug output trace mechanism and has
1898 a much larger code and data size.
1901 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1902 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1904 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1905 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1907 ----------------------------------------
1908 15 December 2006. Summary of changes for version 20061215:
1910 1) ACPI CA Core Subsystem:
1912 Support for 16-bit ACPICA has been completely removed since it is no longer
1913 necessary and it clutters the code. All 16-bit macros, types, and
1914 conditional compiles have been removed, cleaning up and simplifying the code
1915 across the entire subsystem. DOS support is no longer needed since the
1916 bootable Linux firmware kit is now available.
1918 The handler for the Global Lock is now removed during AcpiTerminate to
1919 enable a clean subsystem restart, via the implementation of the
1920 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
1923 Implemented enhancements to the multithreading support within the debugger
1924 to enable improved multithreading debugging and evaluation of the subsystem.
1927 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
1928 memory used during the execution, as well as the maximum memory consumed by
1929 each of the various object types. (Valery Podrezov)
1931 Example Code and Data Size: These are the sizes for the OS-independent
1932 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1933 debug version of the code includes the debug output trace mechanism and has
1934 a much larger code and data size.
1937 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1938 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1940 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1941 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1944 2) iASL Compiler/Disassembler and Tools:
1946 AcpiExec: Implemented a new option (-m) to display full memory use
1947 statistics upon subsystem/program termination. (Valery Podrezov)
1949 ----------------------------------------
1950 09 November 2006. Summary of changes for version 20061109:
1952 1) ACPI CA Core Subsystem:
1954 Optimized the Load ASL operator in the case where the source operand is an
1955 operation region. Simply map the operation region memory, instead of
1956 performing a bytewise read. (Region must be of type SystemMemory, see
1959 Fixed the Load ASL operator for the case where the source operand is a
1960 region field. A buffer object is also allowed as the source operand. BZ 480
1962 Fixed a problem where the Load ASL operator allowed the source operand to be
1963 an operation region of any type. It is now restricted to regions of type
1964 SystemMemory, as per the ACPI specification. BZ 481
1966 Additional cleanup and optimizations for the new Table Manager code.
1968 AcpiEnable will now fail if all of the required ACPI tables are not loaded
1969 (FADT, FACS, DSDT). BZ 477
1971 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
1972 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
1973 manually optimized to be aligned and will not work if it is byte-packed.
1975 Example Code and Data Size: These are the sizes for the OS-independent
1976 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1977 debug version of the code includes the debug output trace mechanism and has
1978 a much larger code and data size.
1981 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
1982 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1984 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1985 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1988 2) iASL Compiler/Disassembler and Tools:
1990 Fixed a problem where the presence of the _OSI predefined control method
1991 within complex expressions could cause an internal compiler error.
1993 AcpiExec: Implemented full region support for multiple address spaces.
1994 SpaceId is now part of the REGION object. BZ 429
1996 ----------------------------------------
1997 11 October 2006. Summary of changes for version 20061011:
1999 1) ACPI CA Core Subsystem:
2001 Completed an AML interpreter performance enhancement for control method
2002 execution. Previously a 2-pass parse/execution, control methods are now
2003 completely parsed and executed in a single pass. This improves overall
2004 interpreter performance by ~25%, reduces code size, and reduces CPU stack
2005 use. (Valery Podrezov + interpreter changes in version 20051202 that
2006 eliminated namespace loading during the pass one parse.)
2008 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
2009 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
2010 obtained and also checked for an ID match.
2012 Implemented additional support for the PCI _ADR execution: upsearch until a
2013 device scope is found before executing _ADR. This allows PCI_Config
2014 operation regions to be declared locally within control methods underneath
2017 Fixed a problem with a possible race condition between threads executing
2018 AcpiWalkNamespace and the AML interpreter. This condition was removed by
2019 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
2020 entries created during any concurrent control method execution. An
2021 additional namespace race condition is known to exist between
2022 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
2025 Restructured the AML ParseLoop function, breaking it into several
2026 subfunctions in order to reduce CPU stack use and improve maintainability.
2029 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
2030 of prefix handle and pathname. BZ 478
2032 Example Code and Data Size: These are the sizes for the OS-independent
2033 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2034 debug version of the code includes the debug output trace mechanism and has
2035 a much larger code and data size.
2038 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2039 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2041 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2042 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2044 2) iASL Compiler/Disassembler and Tools:
2046 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
2047 to restore original behavior.
2049 ----------------------------------------
2050 27 September 2006. Summary of changes for version 20060927:
2052 1) ACPI CA Core Subsystem:
2054 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
2055 These functions now use a spinlock for mutual exclusion and the interrupt
2056 level indication flag is not needed.
2058 Fixed a problem with the Global Lock where the lock could appear to be
2059 obtained before it is actually obtained. The global lock semaphore was
2060 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
2063 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
2064 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
2066 Example Code and Data Size: These are the sizes for the OS-independent
2067 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2068 debug version of the code includes the debug output trace mechanism and has
2069 a much larger code and data size.
2072 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2073 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2075 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2076 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2079 2) iASL Compiler/Disassembler and Tools:
2081 Fixed a compilation problem with the pre-defined Resource Descriptor field
2082 names where an "object does not exist" error could be incorrectly generated
2083 if the parent ResourceTemplate pathname places the template within a
2084 different namespace scope than the current scope. (BZ 7212)
2086 Fixed a problem where the compiler could hang after syntax errors detected
2087 in an ElseIf construct. (BZ 453)
2089 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
2090 operator. An incorrect output filename was produced when this parameter was
2091 a null string (""). Now, the original input filename is used as the AML
2092 output filename, with an ".aml" extension.
2094 Implemented a generic batch command mode for the AcpiExec utility (execute
2095 any AML debugger command) (Valery Podrezov).
2097 ----------------------------------------
2098 12 September 2006. Summary of changes for version 20060912:
2100 1) ACPI CA Core Subsystem:
2102 Enhanced the implementation of the "serialized mode" of the interpreter
2103 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
2104 specified, instead of creating a serialization semaphore per control method,
2105 the interpreter lock is simply no longer released before a blocking
2106 operation during control method execution. This effectively makes the AML
2107 Interpreter single-threaded. The overhead of a semaphore per-method is
2110 Fixed a regression where an error was no longer emitted if a control method
2111 attempts to create 2 objects of the same name. This once again returns
2112 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
2113 will dynamically serialize the control method to possible prevent future
2116 Integrated a fix for a problem with PCI Express HID detection in the PCI
2117 Config Space setup procedure. (BZ 7145)
2119 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
2120 AcpiHwInitialize function - the FADT registers are now validated when the
2123 Added two new warnings during FADT verification - 1) if the FADT is larger
2124 than the largest known FADT version, and 2) if there is a mismatch between a
2125 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
2127 Example Code and Data Size: These are the sizes for the OS-independent
2128 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2129 debug version of the code includes the debug output trace mechanism and has
2130 a much larger code and data size.
2133 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2134 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2136 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2137 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2140 2) iASL Compiler/Disassembler and Tools:
2142 Fixed a problem with the implementation of the Switch() operator where the
2143 temporary variable was declared too close to the actual Switch, instead of
2144 at method level. This could cause a problem if the Switch() operator is
2145 within a while loop, causing an error on the second iteration. (BZ 460)
2147 Disassembler - fix for error emitted for unknown type for target of scope
2148 operator. Now, ignore it and continue.
2150 Disassembly of an FADT now verifies the input FADT and reports any errors
2151 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
2153 Disassembly of raw data buffers with byte initialization data now prefixes
2154 each output line with the current buffer offset.
2156 Disassembly of ASF! table now includes all variable-length data fields at
2157 the end of some of the subtables.
2159 The disassembler now emits a comment if a buffer appears to be a
2160 ResourceTemplate, but cannot be disassembled as such because the EndTag does
2161 not appear at the very end of the buffer.
2163 AcpiExec - Added the "-t" command line option to enable the serialized mode
2164 of the AML interpreter.
2166 ----------------------------------------
2167 31 August 2006. Summary of changes for version 20060831:
2169 1) ACPI CA Core Subsystem:
2171 Miscellaneous fixes for the Table Manager:
2172 - Correctly initialize internal common FADT for all 64-bit "X" fields
2173 - Fixed a couple table mapping issues during table load
2174 - Fixed a couple alignment issues for IA64
2175 - Initialize input array to zero in AcpiInitializeTables
2176 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
2179 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
2180 immediately disabled to prevent the waking GPE from firing again and to
2181 prevent other wake GPEs from interrupting the wake process.
2183 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
2184 be used for debugging systems with a large number of ACPI interrupts.
2186 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
2187 both the ACPICA headers and the disassembler.
2189 Example Code and Data Size: These are the sizes for the OS-independent
2190 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2191 debug version of the code includes the debug output trace mechanism and has
2192 a much larger code and data size.
2195 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2196 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2198 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2199 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2202 2) iASL Compiler/Disassembler and Tools:
2204 Disassembler support for the DMAR ACPI table.
2206 ----------------------------------------
2207 23 August 2006. Summary of changes for version 20060823:
2209 1) ACPI CA Core Subsystem:
2211 The Table Manager component has been completely redesigned and
2212 reimplemented. The new design is much simpler, and reduces the overall code
2213 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
2214 now possible to obtain the ACPI tables very early during kernel
2215 initialization, even before dynamic memory management is initialized.
2216 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
2218 Obsolete ACPICA interfaces:
2220 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
2222 - AcpiLoadTable: Not needed.
2223 - AcpiUnloadTable: Not needed.
2225 New ACPICA interfaces:
2227 - AcpiInitializeTables: Must be called before the table manager can be used.
2228 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
2229 allocated memory after it becomes available.
2230 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
2233 Other ACPICA changes:
2235 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
2236 AcpiOsUnmapMemory to free this mapping.
2237 - AcpiGetTable returns the actual mapped table. The mapping is managed
2238 internally and must not be deleted by the caller. Use of this interface
2239 causes no additional dynamic memory allocation.
2240 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
2241 it appeared to be unused.
2242 - The interface to AcpiOsMapMemory has changed to be consistent with the
2243 other allocation interfaces.
2244 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
2246 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
2247 bit platforms. Was previously 64 bits on all platforms.
2248 - The interface to the ACPI Global Lock acquire/release macros have changed
2249 slightly since ACPICA no longer keeps a local copy of the FACS with a
2250 constructed pointer to the actual global lock.
2252 Porting to the new table manager:
2254 - AcpiInitializeTables: Must be called once, and can be called anytime
2255 during the OS initialization process. It allows the host to specify an area
2256 of memory to be used to store the internal version of the RSDT/XSDT (root
2257 table). This allows the host to access ACPI tables before memory management
2258 is initialized and running.
2259 - AcpiReallocateRootTable: Can be called after memory management is running
2260 to copy the root table to a dynamically allocated array, freeing up the
2261 scratch memory specified in the call to AcpiInitializeTables.
2262 - AcpiSubsystemInitialize: This existing interface is independent of the
2263 Table Manager, and does not have to be called before the Table Manager can
2264 be used, it only must be called before the rest of ACPICA can be used.
2265 - ACPI Tables: Some changes have been made to the names and structure of the
2266 actbl.h and actbl1.h header files and may require changes to existing code.
2267 For example, bitfields have been completely removed because of their lack of
2268 portability across C compilers.
2269 - Update interfaces to the Global Lock acquire/release macros if local
2270 versions are used. (see acwin.h)
2272 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
2276 Example Code and Data Size: These are the sizes for the OS-independent
2277 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2278 debug version of the code includes the debug output trace mechanism and has
2279 a much larger code and data size.
2282 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2283 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2285 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2286 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2289 2) iASL Compiler/Disassembler and Tools:
2291 No changes for this release.
2293 ----------------------------------------
2294 21 July 2006. Summary of changes for version 20060721:
2296 1) ACPI CA Core Subsystem:
2298 The full source code for the ASL test suite used to validate the iASL
2299 compiler and the ACPICA core subsystem is being released with the ACPICA
2300 source for the first time. The source is contained in a separate package and
2301 consists of over 1100 files that exercise all ASL/AML operators. The package
2302 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
2305 Completed a new design and implementation for support of the ACPI Global
2306 Lock. On the OS side, the global lock is now treated as a standard AML
2307 mutex. Previously, multiple OS threads could "acquire" the global lock
2308 simultaneously. However, this could cause the BIOS to be starved out of the
2309 lock - especially in cases such as the Embedded Controller driver where
2310 there is a tight coupling between the OS and the BIOS.
2312 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
2313 The Global Lock interrupt handler no longer queues the execution of a
2314 separate thread to signal the global lock semaphore. Instead, the semaphore
2315 is signaled directly from the interrupt handler.
2317 Implemented support within the AML interpreter for package objects that
2318 contain a larger AML length (package list length) than the package element
2319 count. In this case, the length of the package is truncated to match the
2320 package element count. Some BIOS code apparently modifies the package length
2321 on the fly, and this change supports this behavior. Provides compatibility
2322 with the MS AML interpreter. (With assistance from Fiodor Suietov)
2324 Implemented a temporary fix for the BankValue parameter of a Bank Field to
2325 support all constant values, now including the Zero and One opcodes.
2326 Evaluation of this parameter must eventually be converted to a full TermArg
2327 evaluation. A not-implemented error is now returned (temporarily) for non-
2328 constant values for this parameter.
2330 Fixed problem reports (Fiodor Suietov) integrated:
2331 - Fix for premature object deletion after CopyObject on Operation Region (BZ
2334 Example Code and Data Size: These are the sizes for the OS-independent
2335 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2336 debug version of the code includes the debug output trace mechanism and has
2337 a much larger code and data size.
2340 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
2341 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
2343 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2344 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2347 2) iASL Compiler/Disassembler and Tools:
2349 No changes for this release.
2351 ----------------------------------------
2352 07 July 2006. Summary of changes for version 20060707:
2354 1) ACPI CA Core Subsystem:
2356 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
2357 that do not allow the initialization of address pointers within packed
2358 structures - even though the hardware itself may support misaligned
2359 transfers. Some of the debug data structures are packed by default to
2362 Added an error message for the case where AcpiOsGetThreadId() returns zero.
2363 A non-zero value is required by the core ACPICA code to ensure the proper
2364 operation of AML mutexes and recursive control methods.
2366 The DSDT is now the only ACPI table that determines whether the AML
2367 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
2368 the hooks for per-table 32/64 switching have been removed from the code. A
2369 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
2371 Fixed a possible leak of an OwnerID in the error path of
2372 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
2373 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
2374 when using the AcpiTbDeleteTablesByType interface (with assistance from
2377 Fixed a problem with Serialized control methods where the semaphore
2378 associated with the method could be over-signaled after multiple method
2381 Fixed two issues with the locking of the internal namespace data structure.
2382 Both the Unload() operator and AcpiUnloadTable interface now lock the
2383 namespace during the namespace deletion associated with the table unload
2384 (with assistance from Linn Crosetto.)
2386 Fixed problem reports (Valery Podrezov) integrated:
2387 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
2389 Fixed problem reports (Fiodor Suietov) integrated:
2390 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
2391 - On Address Space handler deletion, needless deactivation call (BZ 374)
2392 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
2393 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
2395 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
2396 - Minimum Length of RSDT should be validated (BZ 379)
2397 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
2399 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
2402 Example Code and Data Size: These are the sizes for the OS-independent
2403 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2404 debug version of the code includes the debug output trace mechanism and has
2405 a much larger code and data size.
2408 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2409 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2411 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2412 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2415 2) iASL Compiler/Disassembler and Tools:
2417 Fixed problem reports:
2418 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2421 ----------------------------------------
2422 23 June 2006. Summary of changes for version 20060623:
2424 1) ACPI CA Core Subsystem:
2426 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
2427 allows the type to be customized to the host OS for improved efficiency
2428 (since a spinlock is usually a very small object.)
2430 Implemented support for "ignored" bits in the ACPI registers. According to
2431 the ACPI specification, these bits should be preserved when writing the
2432 registers via a read/modify/write cycle. There are 3 bits preserved in this
2433 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
2435 Implemented the initial deployment of new OSL mutex interfaces. Since some
2436 host operating systems have separate mutex and semaphore objects, this
2437 feature was requested. The base code now uses mutexes (and the new mutex
2438 interfaces) wherever a binary semaphore was used previously. However, for
2439 the current release, the mutex interfaces are defined as macros to map them
2440 to the existing semaphore interfaces. Therefore, no OSL changes are required
2441 at this time. (See acpiosxf.h)
2443 Fixed several problems with the support for the control method SyncLevel
2444 parameter. The SyncLevel now works according to the ACPI specification and
2445 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
2446 is a property of the executing thread. Mutual exclusion for control methods
2447 is now implemented with a mutex instead of a semaphore.
2449 Fixed three instances of the use of the C shift operator in the bitfield
2450 support code (exfldio.c) to avoid the use of a shift value larger than the
2451 target data width. The behavior of C compilers is undefined in this case and
2452 can cause unpredictable results, and therefore the case must be detected and
2453 avoided. (Fiodor Suietov)
2455 Added an info message whenever an SSDT or OEM table is loaded dynamically
2456 via the Load() or LoadTable() ASL operators. This should improve debugging
2457 capability since it will show exactly what tables have been loaded (beyond
2458 the tables present in the RSDT/XSDT.)
2460 Example Code and Data Size: These are the sizes for the OS-independent
2461 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2462 debug version of the code includes the debug output trace mechanism and has
2463 a much larger code and data size.
2466 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2467 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2469 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2470 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2473 2) iASL Compiler/Disassembler and Tools:
2475 No changes for this release.
2477 ----------------------------------------
2478 08 June 2006. Summary of changes for version 20060608:
2480 1) ACPI CA Core Subsystem:
2482 Converted the locking mutex used for the ACPI hardware to a spinlock. This
2483 change should eliminate all problems caused by attempting to acquire a
2484 semaphore at interrupt level, and it means that all ACPICA external
2485 interfaces that directly access the ACPI hardware can be safely called from
2486 interrupt level. OSL code that implements the semaphore interfaces should be
2487 able to eliminate any workarounds for being called at interrupt level.
2489 Fixed a regression introduced in 20060526 where the ACPI device
2490 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
2491 did not have an optional _INI method.
2493 Fixed an IndexField issue where a write to the Data Register should be
2494 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
2497 Fixed problem reports (Valery Podrezov) integrated:
2498 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
2500 Fixed problem reports (Fiodor Suietov) integrated:
2501 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
2503 Removed four global mutexes that were obsolete and were no longer being
2506 Example Code and Data Size: These are the sizes for the OS-independent
2507 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2508 debug version of the code includes the debug output trace mechanism and has
2509 a much larger code and data size.
2512 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2513 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2515 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2516 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2519 2) iASL Compiler/Disassembler and Tools:
2521 Fixed a fault when using -g option (get tables from registry) on Windows
2524 Fixed problem reports integrated:
2525 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
2526 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
2528 - Global table revision override (-r) is ignored (BZ 413)
2530 ----------------------------------------
2531 26 May 2006. Summary of changes for version 20060526:
2533 1) ACPI CA Core Subsystem:
2535 Restructured, flattened, and simplified the internal interfaces for
2536 namespace object evaluation - resulting in smaller code, less CPU stack use,
2537 and fewer interfaces. (With assistance from Mikhail Kouzmich)
2539 Fixed a problem with the CopyObject operator where the first parameter was
2540 not typed correctly for the parser, interpreter, compiler, and disassembler.
2541 Caused various errors and unexpected behavior.
2543 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
2544 produced incorrect results with some C compilers. Since the behavior of C
2545 compilers when the shift value is larger than the datatype width is
2546 apparently not well defined, the interpreter now detects this condition and
2547 simply returns zero as expected in all such cases. (BZ 395)
2549 Fixed problem reports (Valery Podrezov) integrated:
2550 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
2551 - Allow interpreter to handle nested method declarations (BZ 5361)
2553 Fixed problem reports (Fiodor Suietov) integrated:
2554 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
2555 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
2556 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
2557 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
2558 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
2559 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
2560 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
2561 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
2562 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
2563 - Status of the Global Initialization Handler call not used (BZ 366)
2564 - Incorrect object parameter to Global Initialization Handler (BZ 367)
2566 Example Code and Data Size: These are the sizes for the OS-independent
2567 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2568 debug version of the code includes the debug output trace mechanism and has
2569 a much larger code and data size.
2572 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2573 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2575 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2576 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2579 2) iASL Compiler/Disassembler and Tools:
2581 Modified the parser to allow the names IO, DMA, and IRQ to be used as
2582 namespace identifiers with no collision with existing resource descriptor
2583 macro names. This provides compatibility with other ASL compilers and is
2584 most useful for disassembly/recompilation of existing tables without parse
2585 errors. (With assistance from Thomas Renninger)
2587 Disassembler: fixed an incorrect disassembly problem with the
2588 DataTableRegion and CopyObject operators. Fixed a possible fault during
2589 disassembly of some Alias operators.
2591 ----------------------------------------
2592 12 May 2006. Summary of changes for version 20060512:
2594 1) ACPI CA Core Subsystem:
2596 Replaced the AcpiOsQueueForExecution interface with a new interface named
2597 AcpiOsExecute. The major difference is that the new interface does not have
2598 a Priority parameter, this appeared to be useless and has been replaced by a
2599 Type parameter. The Type tells the host what type of execution is being
2600 requested, such as global lock handler, notify handler, GPE handler, etc.
2601 This allows the host to queue and execute the request as appropriate for the
2602 request type, possibly using different work queues and different priorities
2603 for the various request types. This enables fixes for multithreading
2604 deadlock problems such as BZ #5534, and will require changes to all existing
2605 OS interface layers. (Alexey Starikovskiy and Bob Moore)
2607 Fixed a possible memory leak associated with the support for the so-called
2608 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
2611 Fixed a problem with the Load() operator where a table load from an
2612 operation region could overwrite an internal table buffer by up to 7 bytes
2613 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
2615 Example Code and Data Size: These are the sizes for the OS-independent
2616 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2617 debug version of the code includes the debug output trace mechanism and has
2618 a much larger code and data size.
2621 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2622 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2624 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2625 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2629 2) iASL Compiler/Disassembler and Tools:
2631 Disassembler: Implemented support to cross reference the internal namespace
2632 and automatically generate ASL External() statements for symbols not defined
2633 within the current table being disassembled. This will simplify the
2634 disassembly and recompilation of interdependent tables such as SSDTs since
2635 these statements will no longer have to be added manually.
2637 Disassembler: Implemented experimental support to automatically detect
2638 invocations of external control methods and generate appropriate External()
2639 statements. This is problematic because the AML cannot be correctly parsed
2640 until the number of arguments for each control method is known. Currently,
2641 standalone method invocations and invocations as the source operand of a
2642 Store() statement are supported.
2644 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
2645 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
2646 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
2647 more readable and likely closer to the original ASL source.
2649 ----------------------------------------
2650 21 April 2006. Summary of changes for version 20060421:
2652 1) ACPI CA Core Subsystem:
2654 Removed a device initialization optimization introduced in 20051216 where
2655 the _STA method was not run unless an _INI was also present for the same
2656 device. This optimization could cause problems because it could allow _INI
2657 methods to be run within a not-present device subtree. (If a not-present
2658 device had no _INI, _STA would not be run, the not-present status would not
2659 be discovered, and the children of the device would be incorrectly
2662 Implemented a new _STA optimization where namespace subtrees that do not
2663 contain _INI are identified and ignored during device initialization.
2664 Selectively running _STA can significantly improve boot time on large
2665 machines (with assistance from Len Brown.)
2667 Implemented support for the device initialization case where the returned
2668 _STA flags indicate a device not-present but functioning. In this case, _INI
2669 is not run, but the device children are examined for presence, as per the
2672 Implemented an additional change to the IndexField support in order to
2673 conform to MS behavior. The value written to the Index Register is not
2674 simply a byte offset, it is a byte offset in units of the access width of
2675 the parent Index Field. (Fiodor Suietov)
2677 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
2678 interface is called during the creation of all AML operation regions, and
2679 allows the host OS to exert control over what addresses it will allow the
2680 AML code to access. Operation Regions whose addresses are disallowed will
2681 cause a runtime exception when they are actually accessed (will not affect
2682 or abort table loading.) See oswinxf or osunixxf for an example
2685 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
2686 interface allows the host OS to match the various "optional"
2687 interface/behavior strings for the _OSI predefined control method as
2688 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
2689 for an example implementation.
2691 Restructured and corrected various problems in the exception handling code
2692 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
2693 (with assistance from Takayoshi Kochi.)
2695 Modified the Linux source converter to ignore quoted string literals while
2696 converting identifiers from mixed to lower case. This will correct problems
2697 with the disassembler and other areas where such strings must not be
2700 The ACPI_FUNCTION_* macros no longer require quotes around the function
2701 name. This allows the Linux source converter to convert the names, now that
2702 the converter ignores quoted strings.
2704 Example Code and Data Size: These are the sizes for the OS-independent
2705 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2706 debug version of the code includes the debug output trace mechanism and has
2707 a much larger code and data size.
2711 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2712 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2714 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2715 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2718 2) iASL Compiler/Disassembler and Tools:
2720 Implemented 3 new warnings for iASL, and implemented multiple warning levels
2723 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
2724 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
2725 check for the possible timeout, a warning is issued.
2727 2) Useless operators: If an ASL operator does not specify an optional target
2728 operand and it also does not use the function return value from the
2729 operator, a warning is issued since the operator effectively does nothing.
2731 3) Unreferenced objects: If a namespace object is created, but never
2732 referenced, a warning is issued. This is a warning level 2 since there are
2733 cases where this is ok, such as when a secondary table is loaded that uses
2734 the unreferenced objects. Even so, care is taken to only flag objects that
2735 don't look like they will ever be used. For example, the reserved methods
2736 (starting with an underscore) are usually not referenced because it is
2737 expected that the OS will invoke them.
2739 ----------------------------------------
2740 31 March 2006. Summary of changes for version 20060331:
2742 1) ACPI CA Core Subsystem:
2744 Implemented header file support for the following additional ACPI tables:
2745 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
2746 all current and known ACPI tables are now defined in the ACPICA headers and
2747 are available for use by device drivers and other software.
2749 Implemented support to allow tables that contain ACPI names with invalid
2750 characters to be loaded. Previously, this would cause the table load to
2751 fail, but since there are several known cases of such tables on existing
2752 machines, this change was made to enable ACPI support for them. Also, this
2753 matches the behavior of the Microsoft ACPI implementation.
2755 Fixed a couple regressions introduced during the memory optimization in the
2756 20060317 release. The namespace node definition required additional
2757 reorganization and an internal datatype that had been changed to 8-bit was
2758 restored to 32-bit. (Valery Podrezov)
2760 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
2761 could be passed through to AcpiOsReleaseObject which is unexpected. Such
2762 null pointers are now trapped and ignored, matching the behavior of the
2763 previous implementation before the deployment of AcpiOsReleaseObject.
2764 (Valery Podrezov, Fiodor Suietov)
2766 Fixed a memory mapping leak during the deletion of a SystemMemory operation
2767 region where a cached memory mapping was not deleted. This became a
2768 noticeable problem for operation regions that are defined within frequently
2769 used control methods. (Dana Meyers)
2771 Reorganized the ACPI table header files into two main files: one for the
2772 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
2773 ACPI tables that are consumed by the drivers and other software. The various
2774 FADT definitions were merged into one common section and three different
2775 tables (ACPI 1.0, 1.0+, and 2.0)
2777 Example Code and Data Size: These are the sizes for the OS-independent
2778 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2779 debug version of the code includes the debug output trace mechanism and has
2780 a much larger code and data size.
2783 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2784 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2786 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2787 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2790 2) iASL Compiler/Disassembler and Tools:
2792 Disassembler: Implemented support to decode and format all non-AML ACPI
2793 tables (tables other than DSDTs and SSDTs.) This includes the new tables
2794 added to the ACPICA headers, therefore all current and known ACPI tables are
2797 Disassembler: The change to allow ACPI names with invalid characters also
2798 enables the disassembly of such tables. Invalid characters within names are
2799 changed to '*' to make the name printable; the iASL compiler will still
2800 generate an error for such names, however, since this is an invalid ACPI
2803 Implemented an option for AcpiXtract (-a) to extract all tables found in the
2804 input file. The default invocation extracts only the DSDTs and SSDTs.
2806 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
2807 makefile for the AcpiXtract utility.
2809 ----------------------------------------
2810 17 March 2006. Summary of changes for version 20060317:
2812 1) ACPI CA Core Subsystem:
2814 Implemented the use of a cache object for all internal namespace nodes.
2815 Since there are about 1000 static nodes in a typical system, this will
2816 decrease memory use for cache implementations that minimize per-allocation
2817 overhead (such as a slab allocator.)
2819 Removed the reference count mechanism for internal namespace nodes, since it
2820 was deemed unnecessary. This reduces the size of each namespace node by
2821 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
2822 and 32 bytes for the 64-bit case.
2824 Optimized several internal data structures to reduce object size on 64-bit
2825 platforms by packing data within the 64-bit alignment. This includes the
2826 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
2827 instances corresponding to the namespace objects.
2829 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
2832 Split the allocation tracking mechanism out to a separate file, from
2833 utalloc.c to uttrack.c. This mechanism appears to be only useful for
2834 application-level code. Kernels may wish to not include uttrack.c in
2837 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
2838 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
2841 Code and Data Size: These are the sizes for the acpica.lib produced by the
2842 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2843 driver or OSPM code. The debug version of the code includes the debug output
2844 trace mechanism and has a much larger code and data size. Note that these
2845 values will vary depending on the efficiency of the compiler and the
2846 compiler options used during generation.
2849 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2850 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2852 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2853 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2856 2) iASL Compiler/Disassembler and Tools:
2858 Implemented an ANSI C version of the acpixtract utility. This version will
2859 automatically extract the DSDT and all SSDTs from the input acpidump text
2860 file and dump the binary output to separate files. It can also display a
2861 summary of the input file including the headers for each table found and
2862 will extract any single ACPI table, with any signature. (See
2863 source/tools/acpixtract)
2865 ----------------------------------------
2866 10 March 2006. Summary of changes for version 20060310:
2868 1) ACPI CA Core Subsystem:
2870 Tagged all external interfaces to the subsystem with the new
2871 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
2872 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
2873 macro. The default definition is NULL.
2875 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
2876 This allows the host to define this as necessary to simplify kernel
2877 integration. The default definition is ACPI_NATIVE_UINT.
2879 Fixed two interpreter problems related to error processing, the deletion of
2880 objects, and placing invalid pointers onto the internal operator result
2881 stack. BZ 6028, 6151 (Valery Podrezov)
2883 Increased the reference count threshold where a warning is emitted for large
2884 reference counts in order to eliminate unnecessary warnings on systems with
2885 large namespaces (especially 64-bit.) Increased the value from 0x400 to
2888 Due to universal disagreement as to the meaning of the 'c' in the calloc()
2889 function, the ACPI_MEM_CALLOCATE macro has been renamed to
2890 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
2891 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
2894 Code and Data Size: These are the sizes for the acpica.lib produced by the
2895 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2896 driver or OSPM code. The debug version of the code includes the debug output
2897 trace mechanism and has a much larger code and data size. Note that these
2898 values will vary depending on the efficiency of the compiler and the
2899 compiler options used during generation.
2902 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2903 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2905 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2906 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2909 2) iASL Compiler/Disassembler:
2911 Disassembler: implemented support for symbolic resource descriptor
2912 references. If a CreateXxxxField operator references a fixed offset within a
2913 resource descriptor, a name is assigned to the descriptor and the offset is
2914 translated to the appropriate resource tag and pathname. The addition of
2915 this support brings the disassembled code very close to the original ASL
2916 source code and helps eliminate run-time errors when the disassembled code
2917 is modified (and recompiled) in such a way as to invalidate the original
2920 Implemented support for a Descriptor Name as the last parameter to the ASL
2921 Register() macro. This parameter was inadvertently left out of the ACPI
2922 specification, and will be added for ACPI 3.0b.
2924 Fixed a problem where the use of the "_OSI" string (versus the full path
2925 "\_OSI") caused an internal compiler error. ("No back ptr to op")
2927 Fixed a problem with the error message that occurs when an invalid string is
2928 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
2929 The correct message is now displayed.
2931 ----------------------------------------
2932 17 February 2006. Summary of changes for version 20060217:
2934 1) ACPI CA Core Subsystem:
2936 Implemented a change to the IndexField support to match the behavior of the
2937 Microsoft AML interpreter. The value written to the Index register is now a
2938 byte offset, no longer an index based upon the width of the Data register.
2939 This should fix IndexField problems seen on some machines where the Data
2940 register is not exactly one byte wide. The ACPI specification will be
2941 clarified on this point.
2943 Fixed a problem where several resource descriptor types could overrun the
2944 internal descriptor buffer due to size miscalculation: VendorShort,
2945 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
2946 affect all platforms.
2948 Fixed a problem where individual resource descriptors were misaligned within
2949 the internal buffer, causing alignment faults on IA64 platforms.
2951 Code and Data Size: These are the sizes for the acpica.lib produced by the
2952 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2953 driver or OSPM code. The debug version of the code includes the debug output
2954 trace mechanism and has a much larger code and data size. Note that these
2955 values will vary depending on the efficiency of the compiler and the
2956 compiler options used during generation.
2959 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2960 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2962 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2963 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2966 2) iASL Compiler/Disassembler:
2968 Implemented support for new reserved names: _WDG and _WED are Microsoft
2969 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
2970 defined method (Throttling Depth Limit.)
2972 Fixed a problem where a zero-length VendorShort or VendorLong resource
2973 descriptor was incorrectly emitted as a descriptor of length one.
2975 ----------------------------------------
2976 10 February 2006. Summary of changes for version 20060210:
2978 1) ACPI CA Core Subsystem:
2980 Removed a couple of extraneous ACPI_ERROR messages that appeared during
2981 normal execution. These became apparent after the conversion from
2984 Fixed a problem where the CreateField operator could hang if the BitIndex or
2985 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
2987 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
2988 failed with an exception. This also fixes a couple of related RefOf and
2989 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
2991 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
2992 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
2995 Implemented a memory cleanup at the end of the execution of each iteration
2996 of an AML While() loop, preventing the accumulation of outstanding objects.
2997 (Valery Podrezov, BZ 5427)
2999 Eliminated a chunk of duplicate code in the object resolution code. (Valery
3002 Fixed several warnings during the 64-bit code generation.
3004 The AcpiSrc source code conversion tool now inserts one line of whitespace
3005 after an if() statement that is followed immediately by a comment, improving
3006 readability of the Linux code.
3008 Code and Data Size: The current and previous library sizes for the core
3009 subsystem are shown below. These are the code and data sizes for the
3010 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3011 values do not include any ACPI driver or OSPM code. The debug version of the
3012 code includes the debug output trace mechanism and has a much larger code
3013 and data size. Note that these values will vary depending on the efficiency
3014 of the compiler and the compiler options used during generation.
3017 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3018 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3020 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3021 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3024 2) iASL Compiler/Disassembler:
3026 Fixed a problem with the disassembly of a BankField operator with a complex
3027 expression for the BankValue parameter.
3029 ----------------------------------------
3030 27 January 2006. Summary of changes for version 20060127:
3032 1) ACPI CA Core Subsystem:
3034 Implemented support in the Resource Manager to allow unresolved namestring
3035 references within resource package objects for the _PRT method. This support
3036 is in addition to the previously implemented unresolved reference support
3037 within the AML parser. If the interpreter slack mode is enabled, these
3038 unresolved references will be passed through to the caller as a NULL package
3041 Implemented and deployed new macros and functions for error and warning
3042 messages across the subsystem. These macros are simpler and generate less
3043 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
3044 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
3045 macros remain defined to allow ACPI drivers time to migrate to the new
3048 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
3049 Acquire/Release Lock OSL interfaces.
3051 Fixed a problem where Alias ASL operators are sometimes not correctly
3052 resolved, in both the interpreter and the iASL compiler.
3054 Fixed several problems with the implementation of the ConcatenateResTemplate
3055 ASL operator. As per the ACPI specification, zero length buffers are now
3056 treated as a single EndTag. One-length buffers always cause a fatal
3057 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
3058 cause a fatal exception.
3060 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
3061 interface. (With assistance from Thomas Renninger)
3063 Code and Data Size: The current and previous library sizes for the core
3064 subsystem are shown below. These are the code and data sizes for the
3065 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3066 values do not include any ACPI driver or OSPM code. The debug version of the
3067 code includes the debug output trace mechanism and has a much larger code
3068 and data size. Note that these values will vary depending on the efficiency
3069 of the compiler and the compiler options used during generation.
3072 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3073 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3075 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3076 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3079 2) iASL Compiler/Disassembler:
3081 Fixed an internal error that was generated for any forward references to ASL
3084 ----------------------------------------
3085 13 January 2006. Summary of changes for version 20060113:
3087 1) ACPI CA Core Subsystem:
3089 Added 2006 copyright to all module headers and signons. This affects
3090 virtually every file in the ACPICA core subsystem, iASL compiler, and the
3093 Enhanced the ACPICA error reporting in order to simplify user migration to
3094 the non-debug version of ACPICA. Replaced all instances of the
3095 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
3096 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
3097 respectively. This preserves all error and warning messages in the non-debug
3098 version of the ACPICA code (this has been referred to as the "debug lite"
3099 option.) Over 200 cases were converted to create a total of over 380
3100 error/warning messages across the ACPICA code. This increases the code and
3101 data size of the default non-debug version of the code somewhat (about 13K),
3102 but all error/warning reporting may be disabled if desired (and code
3103 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
3104 configuration option. The size of the debug version of ACPICA remains about
3107 Fixed a memory leak within the AML Debugger "Set" command. One object was
3108 not properly deleted for every successful invocation of the command.
3110 Code and Data Size: The current and previous library sizes for the core
3111 subsystem are shown below. These are the code and data sizes for the
3112 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3113 values do not include any ACPI driver or OSPM code. The debug version of the
3114 code includes the debug output trace mechanism and has a much larger code
3115 and data size. Note that these values will vary depending on the efficiency
3116 of the compiler and the compiler options used during generation.
3119 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3120 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3122 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3123 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3126 2) iASL Compiler/Disassembler:
3128 The compiler now officially supports the ACPI 3.0a specification that was
3129 released on December 30, 2005. (Specification is available at www.acpi.info)
3131 ----------------------------------------
3132 16 December 2005. Summary of changes for version 20051216:
3134 1) ACPI CA Core Subsystem:
3136 Implemented optional support to allow unresolved names within ASL Package
3137 objects. A null object is inserted in the package when a named reference
3138 cannot be located in the current namespace. Enabled via the interpreter
3139 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
3140 that contain such code.
3142 Implemented an optimization to the initialization sequence that can improve
3143 boot time. During ACPI device initialization, the _STA method is now run if
3144 and only if the _INI method exists. The _STA method is used to determine if
3145 the device is present; An _INI can only be run if _STA returns present, but
3146 it is a waste of time to run the _STA method if the _INI does not exist.
3147 (Prototype and assistance from Dong Wei)
3149 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
3150 available in the current compiler. Otherwise, the default (void *) cast is
3153 Fixed some possible memory leaks found within the execution path of the
3154 Break, Continue, If, and CreateField operators. (Valery Podrezov)
3156 Fixed a problem introduced in the 20051202 release where an exception is
3157 generated during method execution if a control method attempts to declare
3160 Moved resource descriptor string constants that are used by both the AML
3161 disassembler and AML debugger to the common utilities directory so that
3162 these components are independent.
3164 Implemented support in the AcpiExec utility (-e switch) to globally ignore
3165 exceptions during control method execution (method is not aborted.)
3167 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
3170 Code and Data Size: The current and previous library sizes for the core
3171 subsystem are shown below. These are the code and data sizes for the
3172 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3173 values do not include any ACPI driver or OSPM code. The debug version of the
3174 code includes the debug output trace mechanism and has a much larger code
3175 and data size. Note that these values will vary depending on the efficiency
3176 of the compiler and the compiler options used during generation.
3179 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3180 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3182 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3183 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3186 2) iASL Compiler/Disassembler:
3188 Fixed a problem where a CPU stack overflow fault could occur if a recursive
3189 method call was made from within a Return statement.
3191 ----------------------------------------
3192 02 December 2005. Summary of changes for version 20051202:
3194 1) ACPI CA Core Subsystem:
3196 Modified the parsing of control methods to no longer create namespace
3197 objects during the first pass of the parse. Objects are now created only
3198 during the execute phase, at the moment the namespace creation operator is
3199 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
3200 should eliminate ALREADY_EXISTS exceptions seen on some machines where
3201 reentrant control methods are protected by an AML mutex. The mutex will now
3202 correctly block multiple threads from attempting to create the same object
3205 Increased the number of available Owner Ids for namespace object tracking
3206 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
3207 some machines with a large number of ACPI tables (either static or dynamic).
3209 Fixed a problem with the AcpiExec utility where a fault could occur when the
3210 -b switch (batch mode) is used.
3212 Enhanced the namespace dump routine to output the owner ID for each
3215 Code and Data Size: The current and previous library sizes for the core
3216 subsystem are shown below. These are the code and data sizes for the
3217 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3218 values do not include any ACPI driver or OSPM code. The debug version of the
3219 code includes the debug output trace mechanism and has a much larger code
3220 and data size. Note that these values will vary depending on the efficiency
3221 of the compiler and the compiler options used during generation.
3224 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3225 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3227 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3228 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3231 2) iASL Compiler/Disassembler:
3233 Fixed a parse error during compilation of certain Switch/Case constructs. To
3234 simplify the parse, the grammar now allows for multiple Default statements
3235 and this error is now detected and flagged during the analysis phase.
3237 Disassembler: The disassembly now includes the contents of the original
3238 table header within a comment at the start of the file. This includes the
3239 name and version of the original ASL compiler.
3241 ----------------------------------------
3242 17 November 2005. Summary of changes for version 20051117:
3244 1) ACPI CA Core Subsystem:
3246 Fixed a problem in the AML parser where the method thread count could be
3247 decremented below zero if any errors occurred during the method parse phase.
3248 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
3249 This also fixed a related regression with the mechanism that detects and
3250 corrects methods that cannot properly handle reentrancy (related to the
3251 deployment of the new OwnerId mechanism.)
3253 Eliminated the pre-parsing of control methods (to detect errors) during
3254 table load. Related to the problem above, this was causing unwind issues if
3255 any errors occurred during the parse, and it seemed to be overkill. A table
3256 load should not be aborted if there are problems with any single control
3257 method, thus rendering this feature rather pointless.
3259 Fixed a problem with the new table-driven resource manager where an internal
3260 buffer overflow could occur for small resource templates.
3262 Implemented a new external interface, AcpiGetVendorResource. This interface
3263 will find and return a vendor-defined resource descriptor within a _CRS or
3264 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
3266 Removed the length limit (200) on string objects as per the upcoming ACPI
3267 3.0A specification. This affects the following areas of the interpreter: 1)
3268 any implicit conversion of a Buffer to a String, 2) a String object result
3269 of the ASL Concatentate operator, 3) the String object result of the ASL
3272 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
3273 on a semaphore object would incorrectly timeout. This allows the
3274 multithreading features of the AcpiExec utility to work properly under
3277 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
3278 the recently added file named "utresrc.c".
3280 Code and Data Size: The current and previous library sizes for the core
3281 subsystem are shown below. These are the code and data sizes for the
3282 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3283 values do not include any ACPI driver or OSPM code. The debug version of the
3284 code includes the debug output trace mechanism and has a much larger code
3285 and data size. Note that these values will vary depending on the efficiency
3286 of the compiler and the compiler options used during generation.
3289 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3290 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3292 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3293 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3296 2) iASL Compiler/Disassembler:
3298 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
3299 specification. For the iASL compiler, this means that string literals within
3300 the source ASL can be of any length.
3302 Enhanced the listing output to dump the AML code for resource descriptors
3303 immediately after the ASL code for each descriptor, instead of in a block at
3304 the end of the entire resource template.
3306 Enhanced the compiler debug output to dump the entire original parse tree
3307 constructed during the parse phase, before any transforms are applied to the
3308 tree. The transformed tree is dumped also.
3310 ----------------------------------------
3311 02 November 2005. Summary of changes for version 20051102:
3313 1) ACPI CA Core Subsystem:
3315 Modified the subsystem initialization sequence to improve GPE support. The
3316 GPE initialization has been split into two parts in order to defer execution
3317 of the _PRW methods (Power Resources for Wake) until after the hardware is
3318 fully initialized and the SCI handler is installed. This allows the _PRW
3319 methods to access fields protected by the Global Lock. This will fix systems
3320 where a NO_GLOBAL_LOCK exception has been seen during initialization.
3322 Converted the ACPI internal object disassemble and display code within the
3323 AML debugger to fully table-driven operation, reducing code size and
3324 increasing maintainability.
3326 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
3327 in the 20051021 release.
3329 Implemented support for "local" internal ACPI object types within the
3330 debugger "Object" command and the AcpiWalkNamespace external interfaces.
3331 These local types include RegionFields, BankFields, IndexFields, Alias, and
3334 Moved common AML resource handling code into a new file, "utresrc.c". This
3335 code is shared by both the Resource Manager and the AML Debugger.
3337 Code and Data Size: The current and previous library sizes for the core
3338 subsystem are shown below. These are the code and data sizes for the
3339 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3340 values do not include any ACPI driver or OSPM code. The debug version of the
3341 code includes the debug output trace mechanism and has a much larger code
3342 and data size. Note that these values will vary depending on the efficiency
3343 of the compiler and the compiler options used during generation.
3346 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3347 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3349 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3350 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3353 2) iASL Compiler/Disassembler:
3355 Fixed a problem with very large initializer lists (more than 4000 elements)
3356 for both Buffer and Package objects where the parse stack could overflow.
3358 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
3359 characters within comment fields. The scan is now always performed and is no
3360 longer optional, detecting invalid characters within a source file
3361 immediately rather than during the parse phase or later.
3363 Enhanced the ASL grammar definition to force early reductions on all list-
3364 style grammar elements so that the overall parse stack usage is greatly
3365 reduced. This should improve performance and reduce the possibility of parse
3368 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
3369 with the addition of a %expected statement, the compiler generates from
3370 source with no warnings.
3372 Fixed a possible segment fault in the disassembler if the input filename
3373 does not contain a "dot" extension (Thomas Renninger).
3375 ----------------------------------------
3376 21 October 2005. Summary of changes for version 20051021:
3378 1) ACPI CA Core Subsystem:
3380 Implemented support for the EM64T and other x86-64 processors. This
3381 essentially entails recognizing that these processors support non-aligned
3382 memory transfers. Previously, all 64-bit processors were assumed to lack
3383 hardware support for non-aligned transfers.
3385 Completed conversion of the Resource Manager to nearly full table-driven
3386 operation. Specifically, the resource conversion code (convert AML to
3387 internal format and the reverse) and the debug code to dump internal
3388 resource descriptors are fully table-driven, reducing code and data size and
3389 improving maintainability.
3391 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
3392 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
3393 Alexey Starikovskiy)
3395 Implemented support within the resource conversion code for the Type-
3396 Specific byte within the various ACPI 3.0 *WordSpace macros.
3398 Fixed some issues within the resource conversion code for the type-specific
3399 flags for both Memory and I/O address resource descriptors. For Memory,
3400 implemented support for the MTP and TTP flags. For I/O, split the TRS and
3401 TTP flags into two separate fields.
3403 Code and Data Size: The current and previous library sizes for the core
3404 subsystem are shown below. These are the code and data sizes for the
3405 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3406 values do not include any ACPI driver or OSPM code. The debug version of the
3407 code includes the debug output trace mechanism and has a much larger code
3408 and data size. Note that these values will vary depending on the efficiency
3409 of the compiler and the compiler options used during generation.
3412 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3413 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3415 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3416 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3420 2) iASL Compiler/Disassembler:
3422 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
3423 corresponding ResourceSource string was not also present in a resource
3424 descriptor declaration. This restriction caused problems with existing
3425 AML/ASL code that includes the Index byte without the string. When such AML
3426 was disassembled, it could not be compiled without modification. Further,
3427 the modified code created a resource template with a different size than the
3428 original, breaking code that used fixed offsets into the resource template
3431 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
3432 byte. This byte is now emitted if present so that the exact AML can be
3433 reproduced when the disassembled code is recompiled.
3435 Improved comments and text alignment for the resource descriptor code
3436 emitted by the disassembler.
3438 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
3439 Register() resource descriptor.
3441 ----------------------------------------
3442 30 September 2005. Summary of changes for version 20050930:
3444 1) ACPI CA Core Subsystem:
3446 Completed a major overhaul of the Resource Manager code - specifically,
3447 optimizations in the area of the AML/internal resource conversion code. The
3448 code has been optimized to simplify and eliminate duplicated code, CPU stack
3449 use has been decreased by optimizing function parameters and local
3450 variables, and naming conventions across the manager have been standardized
3451 for clarity and ease of maintenance (this includes function, parameter,
3452 variable, and struct/typedef names.) The update may force changes in some
3453 driver code, depending on how resources are handled by the host OS.
3455 All Resource Manager dispatch and information tables have been moved to a
3456 single location for clarity and ease of maintenance. One new file was
3457 created, named "rsinfo.c".
3459 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
3460 guarantee that the argument is not evaluated twice, making them less prone
3461 to macro side-effects. However, since there exists the possibility of
3462 additional stack use if a particular compiler cannot optimize them (such as
3463 in the debug generation case), the original macros are optionally available.
3464 Note that some invocations of the return_VALUE macro may now cause size
3465 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
3466 eliminate these. (From Randy Dunlap)
3468 Implemented a new mechanism to enable debug tracing for individual control
3469 methods. A new external interface, AcpiDebugTrace, is provided to enable
3470 this mechanism. The intent is to allow the host OS to easily enable and
3471 disable tracing for problematic control methods. This interface can be
3472 easily exposed to a user or debugger interface if desired. See the file
3473 psxface.c for details.
3475 AcpiUtCallocate will now return a valid pointer if a length of zero is
3476 specified - a length of one is used and a warning is issued. This matches
3477 the behavior of AcpiUtAllocate.
3479 Code and Data Size: The current and previous library sizes for the core
3480 subsystem are shown below. These are the code and data sizes for the
3481 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3482 values do not include any ACPI driver or OSPM code. The debug version of the
3483 code includes the debug output trace mechanism and has a much larger code
3484 and data size. Note that these values will vary depending on the efficiency
3485 of the compiler and the compiler options used during generation.
3488 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3489 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3491 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3492 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3495 2) iASL Compiler/Disassembler:
3497 A remark is issued if the effective compile-time length of a package or
3498 buffer is zero. Previously, this was a warning.
3500 ----------------------------------------
3501 16 September 2005. Summary of changes for version 20050916:
3503 1) ACPI CA Core Subsystem:
3505 Fixed a problem within the Resource Manager where support for the Generic
3506 Register descriptor was not fully implemented. This descriptor is now fully
3507 recognized, parsed, disassembled, and displayed.
3509 Completely restructured the Resource Manager code to utilize table-driven
3510 dispatch and lookup, eliminating many of the large switch() statements. This
3511 reduces overall subsystem code size and code complexity. Affects the
3512 resource parsing and construction, disassembly, and debug dump output.
3514 Cleaned up and restructured the debug dump output for all resource
3515 descriptors. Improved readability of the output and reduced code size.
3517 Fixed a problem where changes to internal data structures caused the
3518 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
3520 Code and Data Size: The current and previous library sizes for the core
3521 subsystem are shown below. These are the code and data sizes for the
3522 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3523 values do not include any ACPI driver or OSPM code. The debug version of the
3524 code includes the debug output trace mechanism and has a much larger code
3525 and data size. Note that these values will vary depending on the efficiency
3526 of the compiler and the compiler options used during generation.
3529 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3530 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3532 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3533 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3536 2) iASL Compiler/Disassembler:
3538 Updated the disassembler to automatically insert an EndDependentFn() macro
3539 into the ASL stream if this macro is missing in the original AML code,
3540 simplifying compilation of the resulting ASL module.
3542 Fixed a problem in the disassembler where a disassembled ResourceSource
3543 string (within a large resource descriptor) was not surrounded by quotes and
3544 not followed by a comma, causing errors when the resulting ASL module was
3545 compiled. Also, escape sequences within a ResourceSource string are now
3546 handled correctly (especially "\\")
3548 ----------------------------------------
3549 02 September 2005. Summary of changes for version 20050902:
3551 1) ACPI CA Core Subsystem:
3553 Fixed a problem with the internal Owner ID allocation and deallocation
3554 mechanisms for control method execution and recursive method invocation.
3555 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
3556 messages seen on some systems. Recursive method invocation depth is
3557 currently limited to 255. (Alexey Starikovskiy)
3559 Completely eliminated all vestiges of support for the "module-level
3560 executable code" until this support is fully implemented and debugged. This
3561 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
3562 some systems that invoke this support.
3564 Fixed a problem within the resource manager code where the transaction flags
3565 for a 64-bit address descriptor were handled incorrectly in the type-
3568 Consolidated duplicate code within the address descriptor resource manager
3569 code, reducing overall subsystem code size.
3571 Fixed a fault when using the AML debugger "disassemble" command to
3572 disassemble individual control methods.
3574 Removed references to the "release_current" directory within the Unix
3577 Code and Data Size: The current and previous core subsystem library sizes
3578 are shown below. These are the code and data sizes for the acpica.lib
3579 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
3580 include any ACPI driver or OSPM code. The debug version of the code includes
3581 the debug output trace mechanism and has a much larger code and data size.
3582 Note that these values will vary depending on the efficiency of the compiler
3583 and the compiler options used during generation.
3586 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3587 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3589 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3590 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3593 2) iASL Compiler/Disassembler:
3595 Implemented an error check for illegal duplicate values in the interrupt and
3596 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
3599 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
3600 too many values in the interrupt list (16 max) and invalid values in the
3603 The maximum length string literal within an ASL file is now restricted to
3604 200 characters as per the ACPI specification.
3606 Fixed a fault when using the -ln option (generate namespace listing).
3608 Implemented an error check to determine if a DescriptorName within a
3609 resource descriptor has already been used within the current scope.
3611 ----------------------------------------
3612 15 August 2005. Summary of changes for version 20050815:
3614 1) ACPI CA Core Subsystem:
3616 Implemented a full bytewise compare to determine if a table load request is
3617 attempting to load a duplicate table. The compare is performed if the table
3618 signatures and table lengths match. This will allow different tables with
3619 the same OEM Table ID and revision to be loaded - probably against the ACPI
3620 specification, but discovered in the field nonetheless.
3622 Added the changes.txt logfile to each of the zipped release packages.
3624 Code and Data Size: Current and previous core subsystem library sizes are
3625 shown below. These are the code and data sizes for the acpica.lib produced
3626 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3627 any ACPI driver or OSPM code. The debug version of the code includes the
3628 debug output trace mechanism and has a much larger code and data size. Note
3629 that these values will vary depending on the efficiency of the compiler and
3630 the compiler options used during generation.
3633 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3634 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3636 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3637 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3640 2) iASL Compiler/Disassembler:
3642 Fixed a problem where incorrect AML code could be generated for Package
3643 objects if optimization is disabled (via the -oa switch).
3645 Fixed a problem with where incorrect AML code is generated for variable-
3646 length packages when the package length is not specified and the number of
3647 initializer values is greater than 255.
3650 ----------------------------------------
3651 29 July 2005. Summary of changes for version 20050729:
3653 1) ACPI CA Core Subsystem:
3655 Implemented support to ignore an attempt to install/load a particular ACPI
3656 table more than once. Apparently there exists BIOS code that repeatedly
3657 attempts to load the same SSDT upon certain events. With assistance from
3658 Venkatesh Pallipadi.
3660 Restructured the main interface to the AML parser in order to correctly
3661 handle all exceptional conditions. This will prevent leakage of the OwnerId
3662 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
3663 machines. With assistance from Alexey Starikovskiy.
3665 Support for "module level code" has been disabled in this version due to a
3666 number of issues that have appeared on various machines. The support can be
3667 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
3668 compilation. When the issues are fully resolved, the code will be enabled by
3671 Modified the internal functions for debug print support to define the
3672 FunctionName parameter as a (const char *) for compatibility with compiler
3673 built-in macros such as __FUNCTION__, etc.
3675 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
3677 Implemented support to display an object count summary for the AML Debugger
3678 commands Object and Methods.
3680 Code and Data Size: Current and previous core subsystem library sizes are
3681 shown below. These are the code and data sizes for the acpica.lib produced
3682 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3683 any ACPI driver or OSPM code. The debug version of the code includes the
3684 debug output trace mechanism and has a much larger code and data size. Note
3685 that these values will vary depending on the efficiency of the compiler and
3686 the compiler options used during generation.
3689 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3690 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3692 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3693 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3696 2) iASL Compiler/Disassembler:
3698 Fixed a regression that appeared in the 20050708 version of the compiler
3699 where an error message was inadvertently emitted for invocations of the _OSI
3700 reserved control method.
3702 ----------------------------------------
3703 08 July 2005. Summary of changes for version 20050708:
3705 1) ACPI CA Core Subsystem:
3707 The use of the CPU stack in the debug version of the subsystem has been
3708 considerably reduced. Previously, a debug structure was declared in every
3709 function that used the debug macros. This structure has been removed in
3710 favor of declaring the individual elements as parameters to the debug
3711 functions. This reduces the cumulative stack use during nested execution of
3712 ACPI function calls at the cost of a small increase in the code size of the
3713 debug version of the subsystem. With assistance from Alexey Starikovskiy and
3716 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
3717 headers to define a macro that will return the current function name at
3718 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
3719 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
3720 compiler-dependent header, the function name is saved on the CPU stack (one
3721 pointer per function.) This mechanism is used because apparently there
3722 exists no standard ANSI-C defined macro that that returns the function name.
3724 Redesigned and reimplemented the "Owner ID" mechanism used to track
3725 namespace objects created/deleted by ACPI tables and control method
3726 execution. A bitmap is now used to allocate and free the IDs, thus solving
3727 the wraparound problem present in the previous implementation. The size of
3728 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
3731 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
3732 flag definitions within the headers for the predefined ACPI tables. These
3733 have been replaced by UINT8_BIT in order to increase the code portability of
3734 the subsystem. If the use of UINT8 remains a problem, we may be forced to
3735 eliminate bitfields entirely because of a lack of portability.
3737 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
3738 is a frequently used function and this improvement increases the performance
3739 of the entire subsystem (Alexey Starikovskiy).
3741 Fixed several possible memory leaks and the inverse - premature object
3742 deletion (Alexey Starikovskiy).
3744 Code and Data Size: Current and previous core subsystem library sizes are
3745 shown below. These are the code and data sizes for the acpica.lib produced
3746 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3747 any ACPI driver or OSPM code. The debug version of the code includes the
3748 debug output trace mechanism and has a much larger code and data size. Note
3749 that these values will vary depending on the efficiency of the compiler and
3750 the compiler options used during generation.
3753 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3754 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3756 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3757 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3759 ----------------------------------------
3760 24 June 2005. Summary of changes for version 20050624:
3762 1) ACPI CA Core Subsystem:
3764 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
3765 the host-defined cache object. This allows the OSL implementation to define
3766 and type this object in any manner desired, simplifying the OSL
3767 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
3768 Linux, and should be defined in the OS-specific header file for other
3769 operating systems as required.
3771 Changed the interface to AcpiOsAcquireObject to directly return the
3772 requested object as the function return (instead of ACPI_STATUS.) This
3773 change was made for performance reasons, since this is the purpose of the
3774 interface in the first place. AcpiOsAcquireObject is now similar to the
3775 AcpiOsAllocate interface.
3777 Implemented a new AML debugger command named Businfo. This command displays
3778 information about all devices that have an associate _PRT object. The _ADR,
3779 _HID, _UID, and _CID are displayed for these devices.
3781 Modified the initialization sequence in AcpiInitializeSubsystem to call the
3782 OSL interface AcpiOslInitialize first, before any local initialization. This
3783 change was required because the global initialization now calls OSL
3786 Enhanced the Dump command to display the entire contents of Package objects
3787 (including all sub-objects and their values.)
3789 Restructured the code base to split some files because of size and/or
3790 because the code logically belonged in a separate file. New files are listed
3791 below. All makefiles and project files included in the ACPI CA release have
3793 utilities/utcache.c /* Local cache interfaces */
3794 utilities/utmutex.c /* Local mutex support */
3795 utilities/utstate.c /* State object support */
3796 interpreter/parser/psloop.c /* Main AML parse loop */
3798 Code and Data Size: Current and previous core subsystem library sizes are
3799 shown below. These are the code and data sizes for the acpica.lib produced
3800 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3801 any ACPI driver or OSPM code. The debug version of the code includes the
3802 debug output trace mechanism and has a much larger code and data size. Note
3803 that these values will vary depending on the efficiency of the compiler and
3804 the compiler options used during generation.
3807 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3808 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3810 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3811 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3814 2) iASL Compiler/Disassembler:
3816 Fixed a regression introduced in version 20050513 where the use of a Package
3817 object within a Case() statement caused a compile time exception. The
3818 original behavior has been restored (a Match() operator is emitted.)
3820 ----------------------------------------
3821 17 June 2005. Summary of changes for version 20050617:
3823 1) ACPI CA Core Subsystem:
3825 Moved the object cache operations into the OS interface layer (OSL) to allow
3826 the host OS to handle these operations if desired (for example, the Linux
3827 OSL will invoke the slab allocator). This support is optional; the compile
3828 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
3829 code in the ACPI CA core. The new OSL interfaces are shown below. See
3830 utalloc.c for an example implementation, and acpiosxf.h for the exact
3831 interface definitions. With assistance from Alexey Starikovskiy.
3838 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
3839 and restore a flags parameter. This fits better with many OS lock models.
3840 Note: the current execution state (interrupt handler or not) is no longer
3841 passed to these interfaces. If necessary, the OSL must determine this state
3842 by itself, a simple and fast operation. With assistance from Alexey
3845 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
3846 present if the revision of the RSDP was 2 or greater. According to the ACPI
3847 specification, the XSDT is optional in all cases, and the table manager
3848 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
3849 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
3852 Fixed an interpreter problem with the Mid() operator in the case of an input
3853 string where the resulting output string is of zero length. It now correctly
3854 returns a valid, null terminated string object instead of a string object
3855 with a null pointer.
3857 Fixed a problem with the control method argument handling to allow a store
3858 to an Arg object that already contains an object of type Device. The Device
3859 object is now correctly overwritten. Previously, an error was returned.
3862 Enhanced the debugger Find command to emit object values in addition to the
3863 found object pathnames. The output format is the same as the dump namespace
3866 Enhanced the debugger Set command. It now has the ability to set the value
3867 of any Named integer object in the namespace (Previously, only method locals
3868 and args could be set.)
3870 Code and Data Size: Current and previous core subsystem library sizes are
3871 shown below. These are the code and data sizes for the acpica.lib produced
3872 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3873 any ACPI driver or OSPM code. The debug version of the code includes the
3874 debug output trace mechanism and has a much larger code and data size. Note
3875 that these values will vary depending on the efficiency of the compiler and
3876 the compiler options used during generation.
3879 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3880 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3882 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3883 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3886 2) iASL Compiler/Disassembler:
3888 Fixed a regression in the disassembler where if/else/while constructs were
3889 output incorrectly. This problem was introduced in the previous release
3890 (20050526). This problem also affected the single-step disassembly in the
3893 Fixed a problem where compiling the reserved _OSI method would randomly (but
3894 rarely) produce compile errors.
3896 Enhanced the disassembler to emit compilable code in the face of incorrect
3897 AML resource descriptors. If the optional ResourceSourceIndex is present,
3898 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
3899 disassembly. Otherwise, the resulting code cannot be compiled without
3902 ----------------------------------------
3903 26 May 2005. Summary of changes for version 20050526:
3905 1) ACPI CA Core Subsystem:
3907 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
3908 the module level (not within a control method.) These opcodes are executed
3909 exactly once at the time the table is loaded. This type of code was legal up
3910 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
3911 order to provide backwards compatibility with earlier BIOS implementations.
3912 This eliminates the "Encountered executable code at module level" warning
3913 that was previously generated upon detection of such code.
3915 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
3916 inadvertently be generated during the lookup of namespace objects in the
3917 second pass parse of ACPI tables and control methods. It appears that this
3918 problem could occur during the resolution of forward references to namespace
3921 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
3922 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
3923 allows the deadlock detection debug code to be compiled out in the normal
3924 case, improving mutex performance (and overall subsystem performance)
3927 Implemented a handful of miscellaneous fixes for possible memory leaks on
3928 error conditions and error handling control paths. These fixes were
3929 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
3931 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
3932 to prevent a fault in this error case.
3934 Code and Data Size: Current and previous core subsystem library sizes are
3935 shown below. These are the code and data sizes for the acpica.lib produced
3936 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3937 any ACPI driver or OSPM code. The debug version of the code includes the
3938 debug output trace mechanism and has a much larger code and data size. Note
3939 that these values will vary depending on the efficiency of the compiler and
3940 the compiler options used during generation.
3943 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3944 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3946 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3947 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3950 2) iASL Compiler/Disassembler:
3952 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
3953 the module level (not within a control method.) These operators will be
3954 executed once at the time the table is loaded. This type of code was legal
3955 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
3956 compiler in order to provide backwards compatibility with earlier BIOS ASL
3959 The ACPI integer width (specified via the table revision ID or the -r
3960 override, 32 or 64 bits) is now used internally during compile-time constant
3961 folding to ensure that constants are truncated to 32 bits if necessary.
3962 Previously, the revision ID value was only emitted in the AML table header.
3964 An error message is now generated for the Mutex and Method operators if the
3965 SyncLevel parameter is outside the legal range of 0 through 15.
3967 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
3968 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
3969 The actual underlying implementation of method argument typechecking is
3970 still under development, however.
3972 ----------------------------------------
3973 13 May 2005. Summary of changes for version 20050513:
3975 1) ACPI CA Core Subsystem:
3977 Implemented support for PCI Express root bridges -- added support for device
3978 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
3980 The interpreter now automatically truncates incoming 64-bit constants to 32
3981 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
3982 also affects the iASL compiler constant folding. (Note: as per below, the
3983 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
3985 Fixed a problem where string and buffer objects with "static" pointers
3986 (pointers to initialization data within an ACPI table) were not handled
3987 consistently. The internal object copy operation now always copies the data
3988 to a newly allocated buffer, regardless of whether the source object is
3991 Fixed a problem with the FromBCD operator where an implicit result
3992 conversion was improperly performed while storing the result to the target
3993 operand. Since this is an "explicit conversion" operator, the implicit
3994 conversion should never be performed on the output.
3996 Fixed a problem with the CopyObject operator where a copy to an existing
3997 named object did not always completely overwrite the existing object stored
3998 at name. Specifically, a buffer-to-buffer copy did not delete the existing
4001 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
4002 structs for consistency.
4004 Code and Data Size: Current and previous core subsystem library sizes are
4005 shown below. These are the code and data sizes for the acpica.lib produced
4006 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4007 any ACPI driver or OSPM code. The debug version of the code includes the
4008 debug output trace mechanism and has a much larger code and data size. Note
4009 that these values will vary depending on the efficiency of the compiler and
4010 the compiler options used during generation.
4013 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4014 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4015 Current Release: (Same sizes)
4016 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4017 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4020 2) iASL Compiler/Disassembler:
4022 The compiler now emits a warning if an attempt is made to generate a 64-bit
4023 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
4024 is truncated to 32 bits.
4026 Fixed a problem with large package objects: if the static length of the
4027 package is greater than 255, the "variable length package" opcode is
4028 emitted. Previously, this caused an error. This requires an update to the
4029 ACPI spec, since it currently (incorrectly) states that packages larger than
4030 255 elements are not allowed.
4032 The disassembler now correctly handles variable length packages and packages
4033 larger than 255 elements.
4035 ----------------------------------------
4036 08 April 2005. Summary of changes for version 20050408:
4038 1) ACPI CA Core Subsystem:
4040 Fixed three cases in the interpreter where an "index" argument to an ASL
4041 function was still (internally) 32 bits instead of the required 64 bits.
4042 This was the Index argument to the Index, Mid, and Match operators.
4044 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
4045 not a POSIX-defined function and not present in most kernel-level C
4046 libraries. All references to the C library strupr function have been removed
4049 Completed the deployment of static functions/prototypes. All prototypes with
4050 the static attribute have been moved from the headers to the owning C file.
4052 Implemented an extract option (-e) for the AcpiBin utility (AML binary
4053 utility). This option allows the utility to extract individual ACPI tables
4054 from the output of AcpiDmp. It provides the same functionality of the
4055 acpixtract.pl perl script without the worry of setting the correct perl
4056 options. AcpiBin runs on Windows and has not yet been generated/validated in
4057 the Linux/Unix environment (but should be soon).
4059 Updated and fixed the table dump option for AcpiBin (-d). This option
4060 converts a single ACPI table to a hex/ascii file, similar to the output of
4063 Code and Data Size: Current and previous core subsystem library sizes are
4064 shown below. These are the code and data sizes for the acpica.lib produced
4065 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4066 any ACPI driver or OSPM code. The debug version of the code includes the
4067 debug output trace mechanism and has a much larger code and data size. Note
4068 that these values will vary depending on the efficiency of the compiler and
4069 the compiler options used during generation.
4072 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4073 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4075 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4076 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4079 2) iASL Compiler/Disassembler:
4081 Disassembler fix: Added a check to ensure that the table length found in the
4082 ACPI table header within the input file is not longer than the actual input
4083 file size. This indicates some kind of file or table corruption.
4085 ----------------------------------------
4086 29 March 2005. Summary of changes for version 20050329:
4088 1) ACPI CA Core Subsystem:
4090 An error is now generated if an attempt is made to create a Buffer Field of
4091 length zero (A CreateField with a length operand of zero.)
4093 The interpreter now issues a warning whenever executable code at the module
4094 level is detected during ACPI table load. This will give some idea of the
4095 prevalence of this type of code.
4097 Implemented support for references to named objects (other than control
4098 methods) within package objects.
4100 Enhanced package object output for the debug object. Package objects are now
4101 completely dumped, showing all elements.
4103 Enhanced miscellaneous object output for the debug object. Any object can
4104 now be written to the debug object (for example, a device object can be
4105 written, and the type of the object will be displayed.)
4107 The "static" qualifier has been added to all local functions across both the
4108 core subsystem and the iASL compiler.
4110 The number of "long" lines (> 80 chars) within the source has been
4111 significantly reduced, by about 1/3.
4113 Cleaned up all header files to ensure that all CA/iASL functions are
4114 prototyped (even static functions) and the formatting is consistent.
4116 Two new header files have been added, acopcode.h and acnames.h.
4118 Removed several obsolete functions that were no longer used.
4120 Code and Data Size: Current and previous core subsystem library sizes are
4121 shown below. These are the code and data sizes for the acpica.lib produced
4122 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4123 any ACPI driver or OSPM code. The debug version of the code includes the
4124 debug output trace mechanism and has a much larger code and data size. Note
4125 that these values will vary depending on the efficiency of the compiler and
4126 the compiler options used during generation.
4129 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4130 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4132 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4133 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4137 2) iASL Compiler/Disassembler:
4139 Fixed a problem with the resource descriptor generation/support. For the
4140 ResourceSourceIndex and the ResourceSource fields, both must be present, or
4141 both must be not present - can't have one without the other.
4143 The compiler now returns non-zero from the main procedure if any errors have
4144 occurred during the compilation.
4147 ----------------------------------------
4148 09 March 2005. Summary of changes for version 20050309:
4150 1) ACPI CA Core Subsystem:
4152 The string-to-buffer implicit conversion code has been modified again after
4153 a change to the ACPI specification. In order to match the behavior of the
4154 other major ACPI implementation, the target buffer is no longer truncated if
4155 the source string is smaller than an existing target buffer. This change
4156 requires an update to the ACPI spec, and should eliminate the recent
4157 AE_AML_BUFFER_LIMIT issues.
4159 The "implicit return" support was rewritten to a new algorithm that solves
4160 the general case. Rather than attempt to determine when a method is about to
4161 exit, the result of every ASL operator is saved momentarily until the very
4162 next ASL operator is executed. Therefore, no matter how the method exits,
4163 there will always be a saved implicit return value. This feature is only
4164 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
4165 AE_AML_NO_RETURN_VALUE errors when enabled.
4167 Implemented implicit conversion support for the predicate (operand) of the
4168 If, Else, and While operators. String and Buffer arguments are automatically
4169 converted to Integers.
4171 Changed the string-to-integer conversion behavior to match the new ACPI
4172 errata: "If no integer object exists, a new integer is created. The ASCII
4173 string is interpreted as a hexadecimal constant. Each string character is
4174 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
4175 with the first character as the most significant digit, and ending with the
4176 first non-hexadecimal character or end-of-string." This means that the first
4177 non-hex character terminates the conversion and this is the code that was
4180 Fixed a problem where the ObjectType operator would fail (fault) when used
4181 on an Index of a Package which pointed to a null package element. The
4182 operator now properly returns zero (Uninitialized) in this case.
4184 Fixed a problem where the While operator used excessive memory by not
4185 properly popping the result stack during execution. There was no memory leak
4186 after execution, however. (Code provided by Valery Podrezov.)
4188 Fixed a problem where references to control methods within Package objects
4189 caused the method to be invoked, instead of producing a reference object
4190 pointing to the method.
4192 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
4193 improve performance and reduce code size. (Code provided by Alexey
4196 Code and Data Size: Current and previous core subsystem library sizes are
4197 shown below. These are the code and data sizes for the acpica.lib produced
4198 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4199 any ACPI driver or OSPM code. The debug version of the code includes the
4200 debug output trace mechanism and has a much larger code and data size. Note
4201 that these values will vary depending on the efficiency of the compiler and
4202 the compiler options used during generation.
4205 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4206 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4208 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4209 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4212 2) iASL Compiler/Disassembler:
4214 Fixed a problem with the Return operator with no arguments. Since the AML
4215 grammar for the byte encoding requires an operand for the Return opcode, the
4216 compiler now emits a Return(Zero) for this case. An ACPI specification
4217 update has been written for this case.
4219 For tables other than the DSDT, namepath optimization is automatically
4220 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
4221 compiler has no knowledge of where, and thus cannot optimize namepaths.
4223 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
4224 inadvertently omitted from the ACPI specification, and will require an
4227 The source file scan for ASCII characters is now optional (-a). This change
4228 was made because some vendors place non-ascii characters within comments.
4229 However, the scan is simply a brute-force byte compare to ensure all
4230 characters in the file are in the range 0x00 to 0x7F.
4232 Fixed a problem with the CondRefOf operator where the compiler was
4233 inappropriately checking for the existence of the target. Since the point of
4234 the operator is to check for the existence of the target at run-time, the
4235 compiler no longer checks for the target existence.
4237 Fixed a problem where errors generated from the internal AML interpreter
4238 during constant folding were not handled properly, causing a fault.
4240 Fixed a problem with overly aggressive range checking for the Stall
4241 operator. The valid range (max 255) is now only checked if the operand is of
4242 type Integer. All other operand types cannot be statically checked.
4244 Fixed a problem where control method references within the RefOf, DeRefOf,
4245 and ObjectType operators were not treated properly. They are now treated as
4246 actual references, not method invocations.
4248 Fixed and enhanced the "list namespace" option (-ln). This option was broken
4249 a number of releases ago.
4251 Improved error handling for the Field, IndexField, and BankField operators.
4252 The compiler now cleanly reports and recovers from errors in the field
4253 component (FieldUnit) list.
4255 Fixed a disassembler problem where the optional ResourceDescriptor fields
4256 TRS and TTP were not always handled correctly.
4258 Disassembler - Comments in output now use "//" instead of "/*"
4260 ----------------------------------------
4261 28 February 2005. Summary of changes for version 20050228:
4263 1) ACPI CA Core Subsystem:
4265 Fixed a problem where the result of an Index() operator (an object
4266 reference) must increment the reference count on the target object for the
4267 life of the object reference.
4269 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
4270 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
4271 resource descriptors.
4273 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
4274 Space Descriptor" string, indicating interpreter support for the descriptors
4277 Implemented header support for the new ACPI 3.0 FADT flag bits.
4279 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
4280 status/enable registers.
4282 Updated header support for the MADT processor local Apic struct and MADT
4283 platform interrupt source struct for new ACPI 3.0 fields.
4285 Implemented header support for the SRAT and SLIT ACPI tables.
4287 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
4290 Code and Data Size: Current and previous core subsystem library sizes are
4291 shown below. These are the code and data sizes for the acpica.lib produced
4292 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4293 any ACPI driver or OSPM code. The debug version of the code includes the
4294 debug output trace mechanism and has a much larger code and data size. Note
4295 that these values will vary depending on the efficiency of the compiler and
4296 the compiler options used during generation.
4299 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4300 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4302 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4303 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4306 2) iASL Compiler/Disassembler:
4308 Fixed a problem with the internal 64-bit String-to-integer conversion with
4309 strings less than two characters long.
4311 Fixed a problem with constant folding where the result of the Index()
4312 operator can not be considered a constant. This means that Index() cannot be
4313 a type3 opcode and this will require an update to the ACPI specification.
4315 Disassembler: Implemented support for the TTP, MTP, and TRS resource
4316 descriptor fields. These fields were inadvertently ignored and not output in
4317 the disassembly of the resource descriptor.
4320 ----------------------------------------
4321 11 February 2005. Summary of changes for version 20050211:
4323 1) ACPI CA Core Subsystem:
4325 Implemented ACPI 3.0 support for implicit conversion within the Match()
4326 operator. MatchObjects can now be of type integer, buffer, or string instead
4327 of just type integer. Package elements are implicitly converted to the type
4328 of the MatchObject. This change aligns the behavior of Match() with the
4329 behavior of the other logical operators (LLess(), etc.) It also requires an
4330 errata change to the ACPI specification as this support was intended for
4331 ACPI 3.0, but was inadvertently omitted.
4333 Fixed a problem with the internal implicit "to buffer" conversion. Strings
4334 that are converted to buffers will cause buffer truncation if the string is
4335 smaller than the target buffer. Integers that are converted to buffers will
4336 not cause buffer truncation, only zero extension (both as per the ACPI
4337 spec.) The problem was introduced when code was added to truncate the
4338 buffer, but this should not be performed in all cases, only the string case.
4340 Fixed a problem with the Buffer and Package operators where the interpreter
4341 would get confused if two such operators were used as operands to an ASL
4342 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
4343 stack was not being popped after the execution of these operators, resulting
4344 in an AE_NO_RETURN_VALUE exception.
4346 Fixed a problem with constructs of the form Store(Index(...),...). The
4347 reference object returned from Index was inadvertently resolved to an actual
4348 value. This problem was introduced in version 20050114 when the behavior of
4349 Store() was modified to restrict the object types that can be used as the
4350 source operand (to match the ACPI specification.)
4352 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
4354 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
4356 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
4358 Code and Data Size: Current and previous core subsystem library sizes are
4359 shown below. These are the code and data sizes for the acpica.lib produced
4360 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4361 any ACPI driver or OSPM code. The debug version of the code includes the
4362 debug output trace mechanism and has a much larger code and data size. Note
4363 that these values will vary depending on the efficiency of the compiler and
4364 the compiler options used during generation.
4367 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4368 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4370 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4371 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4374 2) iASL Compiler/Disassembler:
4376 Fixed a code generation problem in the constant folding optimization code
4377 where incorrect code was generated if a constant was reduced to a buffer
4378 object (i.e., a reduced type 5 opcode.)
4380 Fixed a typechecking problem for the ToBuffer operator. Caused by an
4381 incorrect return type in the internal opcode information table.
4383 ----------------------------------------
4384 25 January 2005. Summary of changes for version 20050125:
4386 1) ACPI CA Core Subsystem:
4388 Fixed a recently introduced problem with the Global Lock where the
4389 underlying semaphore was not created. This problem was introduced in
4390 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
4391 Acquire() operation on _GL.
4393 The local object cache is now optional, and is disabled by default. Both
4394 AcpiExec and the iASL compiler enable the cache because they run in user
4395 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
4396 to enable the local cache.
4398 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
4399 optional "implicit return" support where an error was returned if no return
4400 object was expected, but one was implicitly returned. AE_OK is now returned
4401 in this case and the implicitly returned object is deleted.
4402 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
4403 methods such as _STA and _INI where the return type is known up front.
4405 Fixed a few issues with the internal convert-to-integer code. It now returns
4406 an error if an attempt is made to convert a null string, a string of only
4407 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
4408 and explicit conversion via the ToInteger() operator.
4410 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
4411 not needed for normal operation and should increase the performance of the
4412 entire subsystem. The code remains in case it is needed for debug purposes
4415 The AcpiExec source and makefile are included in the Unix/Linux package for
4418 Code and Data Size: Current and previous core subsystem library sizes are
4419 shown below. These are the code and data sizes for the acpica.lib produced
4420 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4421 any ACPI driver or OSPM code. The debug version of the code includes the
4422 debug output trace mechanism and has a much larger code and data size. Note
4423 that these values will vary depending on the efficiency of the compiler and
4424 the compiler options used during generation.
4427 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4428 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4430 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4431 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4433 2) iASL Compiler/Disassembler:
4435 Switch/Case support: A warning is now issued if the type of the Switch value
4436 cannot be determined at compile time. For example, Switch(Arg0) will
4437 generate the warning, and the type is assumed to be an integer. As per the
4438 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
4441 Switch/Case support: Implemented support for buffer and string objects as
4442 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
4443 buffers and strings.
4445 Switch/Case support: The emitted code for the LEqual() comparisons now uses
4446 the switch value as the first operand, not the second. The case value is now
4447 the second operand, and this allows the case value to be implicitly
4448 converted to the type of the switch value, not the other way around.
4450 Switch/Case support: Temporary variables are now emitted immediately within
4451 the control method, not at the global level. This means that there are now
4452 36 temps available per-method, not 36 temps per-module as was the case with
4453 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
4455 ----------------------------------------
4456 14 January 2005. Summary of changes for version 20050114:
4458 Added 2005 copyright to all module headers. This affects every module in
4459 the core subsystem, iASL compiler, and the utilities.
4461 1) ACPI CA Core Subsystem:
4463 Fixed an issue with the String-to-Buffer conversion code where the string
4464 null terminator was not included in the buffer after conversion, but there
4465 is existing ASL that assumes the string null terminator is included. This is
4466 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
4467 introduced in the previous version when the code was updated to correctly
4468 set the converted buffer size as per the ACPI specification. The ACPI spec
4469 is ambiguous and will be updated to specify that the null terminator must be
4470 included in the converted buffer. This also affects the ToBuffer() ASL
4473 Fixed a problem with the Mid() ASL/AML operator where it did not work
4474 correctly on Buffer objects. Newly created sub-buffers were not being marked
4478 Fixed a problem in AcpiTbFindTable where incorrect string compares were
4479 performed on the OemId and OemTableId table header fields. These fields are
4480 not null terminated, so strncmp is now used instead of strcmp.
4482 Implemented a restriction on the Store() ASL/AML operator to align the
4483 behavior with the ACPI specification. Previously, any object could be used
4484 as the source operand. Now, the only objects that may be used are Integers,
4485 Buffers, Strings, Packages, Object References, and DDB Handles. If
4486 necessary, the original behavior can be restored by enabling the
4487 EnableInterpreterSlack flag.
4489 Enhanced the optional "implicit return" support to allow an implicit return
4490 value from methods that are invoked externally via the AcpiEvaluateObject
4491 interface. This enables implicit returns from the _STA and _INI methods,
4494 Changed the Revision() ASL/AML operator to return the current version of the
4495 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
4496 the supported ACPI version (This is the function of the _REV method).
4498 Updated the _REV predefined method to return the currently supported version
4501 Implemented batch mode option for the AcpiExec utility (-b).
4503 Code and Data Size: Current and previous core subsystem library sizes are
4504 shown below. These are the code and data sizes for the acpica.lib produced
4505 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4506 any ACPI driver or OSPM code. The debug version of the code includes the
4507 debug output trace mechanism and has a much larger code and data size. Note
4508 that these values will vary depending on the efficiency of the compiler and
4509 the compiler options used during generation.
4512 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4513 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4515 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4516 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4518 ----------------------------------------
4519 10 December 2004. Summary of changes for version 20041210:
4521 ACPI 3.0 support is nearing completion in both the iASL compiler and the
4522 ACPI CA core subsystem.
4524 1) ACPI CA Core Subsystem:
4526 Fixed a problem in the ToDecimalString operator where the resulting string
4527 length was incorrectly calculated. The length is now calculated exactly,
4528 eliminating incorrect AE_STRING_LIMIT exceptions.
4530 Fixed a problem in the ToHexString operator to allow a maximum 200 character
4531 string to be produced.
4533 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
4534 routine where the length of the resulting buffer was not truncated to the
4535 new size (if the target buffer already existed).
4537 Code and Data Size: Current and previous core subsystem library sizes are
4538 shown below. These are the code and data sizes for the acpica.lib produced
4539 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4540 any ACPI driver or OSPM code. The debug version of the code includes the
4541 debug output trace mechanism and has a much larger code and data size. Note
4542 that these values will vary depending on the efficiency of the compiler and
4543 the compiler options used during generation.
4546 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4547 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4549 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4550 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4553 2) iASL Compiler/Disassembler:
4555 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
4556 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
4557 Includes support in the disassembler.
4559 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
4562 Fixed a problem where the _HE resource name for the Interrupt macro was
4563 referencing bit 0 instead of bit 1.
4565 Implemented check for maximum 255 interrupts in the Interrupt macro.
4567 Fixed a problem with the predefined resource descriptor names where
4568 incorrect AML code was generated if the offset within the resource buffer
4569 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
4570 but did not update the surrounding package lengths.
4572 Changes to the Dma macro: All channels within the channel list must be in
4573 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
4574 optional (default is BusMaster).
4576 Implemented check for maximum 7 data bytes for the VendorShort macro.
4578 The ReadWrite parameter is now optional for the Memory32 and similar macros.
4580 ----------------------------------------
4581 03 December 2004. Summary of changes for version 20041203:
4583 1) ACPI CA Core Subsystem:
4585 The low-level field insertion/extraction code (exfldio) has been completely
4586 rewritten to eliminate unnecessary complexity, bugs, and boundary
4589 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
4590 operators where the input operand could be inadvertently deleted if no
4591 conversion was necessary (e.g., if the input to ToInteger was an Integer
4594 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
4595 exception code was returned if the resulting string would be > 200 chars.
4596 AE_STRING_LIMIT is now returned.
4598 Fixed a problem with the Concatenate operator where AE_OK was always
4599 returned, even if the operation failed.
4601 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
4602 semaphores to be allocated.
4604 Code and Data Size: Current and previous core subsystem library sizes are
4605 shown below. These are the code and data sizes for the acpica.lib produced
4606 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4607 any ACPI driver or OSPM code. The debug version of the code includes the
4608 debug output trace mechanism and has a much larger code and data size. Note
4609 that these values will vary depending on the efficiency of the compiler and
4610 the compiler options used during generation.
4613 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4614 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4616 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4617 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4620 2) iASL Compiler/Disassembler:
4622 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
4623 recently introduced in 20041119.
4625 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
4626 byte was inadvertently set to zero.
4628 ----------------------------------------
4629 19 November 2004. Summary of changes for version 20041119:
4631 1) ACPI CA Core Subsystem:
4633 Fixed a problem in the internal ConvertToInteger routine where new integers
4634 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
4635 buffers and strings to integers.
4637 Implemented support to store a value to an Index() on a String object. This
4638 is an ACPI 2.0 feature that had not yet been implemented.
4640 Implemented new behavior for storing objects to individual package elements
4641 (via the Index() operator). The previous behavior was to invoke the implicit
4642 conversion rules if an object was already present at the index. The new
4643 behavior is to simply delete any existing object and directly store the new
4644 object. Although the ACPI specification seems unclear on this subject, other
4645 ACPI implementations behave in this manner. (This is the root of the
4646 AE_BAD_HEX_CONSTANT issue.)
4648 Modified the RSDP memory scan mechanism to support the extended checksum for
4649 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
4650 RSDP signature is found with a valid checksum.
4652 Code and Data Size: Current and previous core subsystem library sizes are
4653 shown below. These are the code and data sizes for the acpica.lib produced
4654 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4655 any ACPI driver or OSPM code. The debug version of the code includes the
4656 debug output trace mechanism and has a much larger code and data size. Note
4657 that these values will vary depending on the efficiency of the compiler and
4658 the compiler options used during generation.
4661 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4662 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4664 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4665 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4668 2) iASL Compiler/Disassembler:
4670 Fixed a missing semicolon in the aslcompiler.y file.
4672 ----------------------------------------
4673 05 November 2004. Summary of changes for version 20041105:
4675 1) ACPI CA Core Subsystem:
4677 Implemented support for FADT revision 2. This was an interim table (between
4678 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
4680 Implemented optional support to allow uninitialized LocalX and ArgX
4681 variables in a control method. The variables are initialized to an Integer
4682 object with a value of zero. This support is enabled by setting the
4683 AcpiGbl_EnableInterpreterSlack flag to TRUE.
4685 Implemented support for Integer objects for the SizeOf operator. Either 4
4686 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
4687 depending on the parent table revision).
4689 Fixed a problem in the implementation of the SizeOf and ObjectType operators
4690 where the operand was resolved to a value too early, causing incorrect
4691 return values for some objects.
4693 Fixed some possible memory leaks during exceptional conditions.
4695 Code and Data Size: Current and previous core subsystem library sizes are
4696 shown below. These are the code and data sizes for the acpica.lib produced
4697 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4698 any ACPI driver or OSPM code. The debug version of the code includes the
4699 debug output trace mechanism and has a much larger code and data size. Note
4700 that these values will vary depending on the efficiency of the compiler and
4701 the compiler options used during generation.
4704 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4705 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4707 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4708 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4711 2) iASL Compiler/Disassembler:
4713 Implemented support for all ACPI 3.0 reserved names and methods.
4715 Implemented all ACPI 3.0 grammar elements in the front-end, including
4716 support for semicolons.
4718 Implemented the ACPI 3.0 Function() and ToUUID() macros
4720 Fixed a problem in the disassembler where a Scope() operator would not be
4721 emitted properly if the target of the scope was in another table.
4723 ----------------------------------------
4724 15 October 2004. Summary of changes for version 20041015:
4726 Note: ACPI CA is currently undergoing an in-depth and complete formal
4727 evaluation to test/verify the following areas. Other suggestions are
4728 welcome. This will result in an increase in the frequency of releases and
4729 the number of bug fixes in the next few months.
4730 - Functional tests for all ASL/AML operators
4731 - All implicit/explicit type conversions
4732 - Bit fields and operation regions
4733 - 64-bit math support and 32-bit-only "truncated" math support
4734 - Exceptional conditions, both compiler and interpreter
4735 - Dynamic object deletion and memory leaks
4736 - ACPI 3.0 support when implemented
4737 - External interfaces to the ACPI subsystem
4740 1) ACPI CA Core Subsystem:
4742 Fixed two alignment issues on 64-bit platforms - within debug statements in
4743 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
4744 field within the non-aligned ACPI generic address structure.
4746 Fixed a problem in the Increment and Decrement operators where incorrect
4747 operand resolution could result in the inadvertent modification of the
4748 original integer when the integer is passed into another method as an
4749 argument and the arg is then incremented/decremented.
4751 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
4752 BCD number were truncated during conversion.
4754 Fixed a problem in the ToDecimal operator where the length of the resulting
4755 string could be set incorrectly too long if the input operand was a Buffer
4758 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
4759 within a buffer would prematurely terminate a compare between buffer
4762 Added a check for string overflow (>200 characters as per the ACPI
4763 specification) during the Concatenate operator with two string operands.
4765 Code and Data Size: Current and previous core subsystem library sizes are
4766 shown below. These are the code and data sizes for the acpica.lib produced
4767 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4768 any ACPI driver or OSPM code. The debug version of the code includes the
4769 debug output trace mechanism and has a much larger code and data size. Note
4770 that these values will vary depending on the efficiency of the compiler and
4771 the compiler options used during generation.
4774 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4775 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4777 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4778 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4782 2) iASL Compiler/Disassembler:
4784 Allow the use of the ObjectType operator on uninitialized Locals and Args
4785 (returns 0 as per the ACPI specification).
4787 Fixed a problem where the compiler would fault if there was a syntax error
4788 in the FieldName of all of the various CreateXXXField operators.
4790 Disallow the use of lower case letters within the EISAID macro, as per the
4791 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
4792 U is an uppercase letter and N is a hex digit.
4795 ----------------------------------------
4796 06 October 2004. Summary of changes for version 20041006:
4798 1) ACPI CA Core Subsystem:
4800 Implemented support for the ACPI 3.0 Timer operator. This ASL function
4801 implements a 64-bit timer with 100 nanosecond granularity.
4803 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
4804 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
4805 the timer with the best clock available. Also, it keeps the core subsystem
4806 out of the clock handling business, since the host OS (usually) performs
4809 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
4810 functions use a 64-bit address which is part of the packed ACPI Generic
4811 Address Structure. Since the structure is non-aligned, the alignment macros
4812 are now used to extract the address to a local variable before use.
4814 Fixed a problem where the ToInteger operator assumed all input strings were
4815 hexadecimal. The operator now handles both decimal strings and hex strings
4816 (prefixed with "0x").
4818 Fixed a problem where the string length in the string object created as a
4819 result of the internal ConvertToString procedure could be incorrect. This
4820 potentially affected all implicit conversions and also the ToDecimalString
4821 and ToHexString operators.
4823 Fixed two problems in the ToString operator. If the length parameter was
4824 zero, an incorrect string object was created and the value of the input
4825 length parameter was inadvertently changed from zero to Ones.
4827 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
4828 resource macro was ignored.
4830 Simplified the interfaces to the internal division functions, reducing code
4831 size and complexity.
4833 Code and Data Size: Current and previous core subsystem library sizes are
4834 shown below. These are the code and data sizes for the acpica.lib produced
4835 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4836 any ACPI driver or OSPM code. The debug version of the code includes the
4837 debug output trace mechanism and has a much larger code and data size. Note
4838 that these values will vary depending on the efficiency of the compiler and
4839 the compiler options used during generation.
4842 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4843 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4845 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4846 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4849 2) iASL Compiler/Disassembler:
4851 Implemented support for the ACPI 3.0 Timer operator.
4853 Fixed a problem where the Default() operator was inadvertently ignored in a
4854 Switch/Case block. This was a problem in the translation of the Switch
4855 statement to If...Else pairs.
4857 Added support to allow a standalone Return operator, with no parentheses (or
4860 Fixed a problem with code generation for the ElseIf operator where the
4861 translated Else...If parse tree was improperly constructed leading to the
4864 ----------------------------------------
4865 22 September 2004. Summary of changes for version 20040922:
4867 1) ACPI CA Core Subsystem:
4869 Fixed a problem with the implementation of the LNot() operator where "Ones"
4870 was not returned for the TRUE case. Changed the code to return Ones instead
4871 of (!Arg) which was usually 1. This change affects iASL constant folding for
4874 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
4875 initialized properly -- Now zero the entire buffer in this case where the
4876 buffer already exists.
4878 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
4879 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
4880 related code considerably. This will require changes/updates to all OS
4881 interface layers (OSLs.)
4883 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
4884 a system exception handler to be installed. This handler is invoked upon any
4885 run-time exception that occurs during control method execution.
4887 Added support for the DSDT in AcpiTbFindTable. This allows the
4888 DataTableRegion() operator to access the local copy of the DSDT.
4890 Code and Data Size: Current and previous core subsystem library sizes are
4891 shown below. These are the code and data sizes for the acpica.lib produced
4892 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4893 any ACPI driver or OSPM code. The debug version of the code includes the
4894 debug output trace mechanism and has a much larger code and data size. Note
4895 that these values will vary depending on the efficiency of the compiler and
4896 the compiler options used during generation.
4899 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4900 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4902 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4903 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4906 2) iASL Compiler/Disassembler:
4908 Fixed a problem with constant folding and the LNot operator. LNot was
4909 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
4910 could result in the generation of an incorrect folded/reduced constant.
4912 End-Of-File is now allowed within a "//"-style comment. A parse error no
4913 longer occurs if such a comment is at the very end of the input ASL source
4916 Implemented the "-r" option to override the Revision in the table header.
4917 The initial use of this option will be to simplify the evaluation of the AML
4918 interpreter by allowing a single ASL source module to be compiled for either
4919 32-bit or 64-bit integers.
4922 ----------------------------------------
4923 27 August 2004. Summary of changes for version 20040827:
4925 1) ACPI CA Core Subsystem:
4927 - Implemented support for implicit object conversion in the non-numeric
4928 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
4929 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
4930 the second operand is implicitly converted on the fly to match the type of
4931 the first operand. For example:
4933 LEqual (Source1, Source2)
4935 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
4936 The data type of Source1 dictates the required type of Source2. Source2 is
4937 implicitly converted if necessary to match the type of Source1.
4939 - Updated and corrected the behavior of the string conversion support. The
4940 rules concerning conversion of buffers to strings (according to the ACPI
4941 specification) are as follows:
4943 ToDecimalString - explicit byte-wise conversion of buffer to string of
4944 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
4945 conversion of buffer to string of hex values (0-FF) separated by commas.
4946 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
4947 copy with no transform except NULL terminated. Any other implicit buffer-to-
4948 string conversion - byte-wise conversion of buffer to string of hex values
4949 (0-FF) separated by spaces.
4951 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
4953 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
4954 one byte too short in the case of a node in the root scope. This could
4955 cause a fault during debug output.
4957 - Code and Data Size: Current and previous core subsystem library sizes are
4958 shown below. These are the code and data sizes for the acpica.lib produced
4959 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4960 any ACPI driver or OSPM code. The debug version of the code includes the
4961 debug output trace mechanism and has a much larger code and data size. Note
4962 that these values will vary depending on the efficiency of the compiler and
4963 the compiler options used during generation.
4966 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4967 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4969 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4970 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4973 2) iASL Compiler/Disassembler:
4975 - Fixed a Linux generation error.
4978 ----------------------------------------
4979 16 August 2004. Summary of changes for version 20040816:
4981 1) ACPI CA Core Subsystem:
4983 Designed and implemented support within the AML interpreter for the so-
4984 called "implicit return". This support returns the result of the last ASL
4985 operation within a control method, in the absence of an explicit Return()
4986 operator. A few machines depend on this behavior, even though it is not
4987 explicitly supported by the ASL language. It is optional support that can
4988 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
4990 Removed support for the PCI_Config address space from the internal low level
4991 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
4992 support was not used internally, and would not work correctly anyway because
4993 the PCI bus number and segment number were not supported. There are
4994 separate interfaces for PCI configuration space access because of the unique
4997 Code and Data Size: Current and previous core subsystem library sizes are
4998 shown below. These are the code and data sizes for the acpica.lib produced
4999 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5000 any ACPI driver or OSPM code. The debug version of the code includes the
5001 debug output trace mechanism and has a much larger code and data size. Note
5002 that these values will vary depending on the efficiency of the compiler and
5003 the compiler options used during generation.
5006 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5007 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5009 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5010 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5013 2) iASL Compiler/Disassembler:
5015 Fixed a problem where constants in ASL expressions at the root level (not
5016 within a control method) could be inadvertently truncated during code
5017 generation. This problem was introduced in the 20040715 release.
5020 ----------------------------------------
5021 15 July 2004. Summary of changes for version 20040715:
5023 1) ACPI CA Core Subsystem:
5025 Restructured the internal HW GPE interfaces to pass/track the current state
5026 of interrupts (enabled/disabled) in order to avoid possible deadlock and
5027 increase flexibility of the interfaces.
5029 Implemented a "lexicographical compare" for String and Buffer objects within
5030 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
5031 as per further clarification to the ACPI specification. Behavior is similar
5032 to C library "strcmp".
5034 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
5035 external function. In the 32-bit non-debug case, the stack use has been
5036 reduced from 168 bytes to 32 bytes.
5038 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
5039 whose purpose is to allow the AML interpreter to forgive certain bad AML
5040 constructs. Default setting is FALSE.
5042 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
5043 support code. If enabled, it allows field access to go beyond the end of a
5044 region definition if the field is within the region length rounded up to the
5045 next access width boundary (a common coding error.)
5047 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
5048 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
5049 symbols are lowercased by the latest version of the AcpiSrc tool.
5051 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
5052 rename "Register" to simply "Reg" to prevent certain compilers from
5055 Code and Data Size: Current and previous core subsystem library sizes are
5056 shown below. These are the code and data sizes for the acpica.lib produced
5057 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5058 any ACPI driver or OSPM code. The debug version of the code includes the
5059 debug output trace mechanism and has a much larger code and data size. Note
5060 that these values will vary depending on the efficiency of the compiler and
5061 the compiler options used during generation.
5064 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5065 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5067 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5068 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5071 2) iASL Compiler/Disassembler:
5073 Implemented full support for Package objects within the Case() operator.
5074 Note: The Break() operator is currently not supported within Case blocks
5075 (TermLists) as there is some question about backward compatibility with ACPI
5079 Fixed a problem where complex terms were not supported properly within the
5082 Eliminated extraneous warning for compiler-emitted reserved names of the
5083 form "_T_x". (Used in Switch/Case operators.)
5085 Eliminated optimization messages for "_T_x" objects and small constants
5086 within the DefinitionBlock operator.
5089 ----------------------------------------
5090 15 June 2004. Summary of changes for version 20040615:
5092 1) ACPI CA Core Subsystem:
5094 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5095 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5098 All directory names in the entire source package are lower case, as they
5099 were in earlier releases.
5101 Implemented "Disassemble" command in the AML debugger that will disassemble
5102 a single control method.
5104 Code and Data Size: Current and previous core subsystem library sizes are
5105 shown below. These are the code and data sizes for the acpica.lib produced
5106 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5107 any ACPI driver or OSPM code. The debug version of the code includes the
5108 debug output trace mechanism and has a much larger code and data size. Note
5109 that these values will vary depending on the efficiency of the compiler and
5110 the compiler options used during generation.
5113 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5114 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5117 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5118 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5121 2) iASL Compiler/Disassembler:
5123 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5124 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5127 All directory names in the entire source package are lower case, as they
5128 were in earlier releases.
5130 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
5133 Fixed an issue with the Windows version of the compiler where later versions
5134 of Windows place the FADT in the registry under the name "FADT" and not
5135 "FACP" as earlier versions did. This applies when using the -g or -
5136 d<nofilename> options. The compiler now looks for both strings as
5139 Fixed a problem with compiler namepath optimization where a namepath within
5140 the Scope() operator could not be optimized if the namepath was a subpath of
5141 the current scope path.
5143 ----------------------------------------
5144 27 May 2004. Summary of changes for version 20040527:
5146 1) ACPI CA Core Subsystem:
5148 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
5149 support in the RSDP scan code. The original code improperly scanned for the
5150 EBDA by simply scanning from memory location 0 to 0x400. The correct method
5151 is to first obtain the EBDA pointer from within the BIOS data area, then
5152 scan 1K of memory starting at the EBDA pointer. There appear to be few if
5153 any machines that place the RSDP in the EBDA, however.
5155 Integrated a fix for a possible fault during evaluation of BufferField
5156 arguments. Obsolete code that was causing the problem was removed.
5158 Found and fixed a problem in the Field Support Code where data could be
5159 corrupted on a bit field read that starts on an aligned boundary but does
5160 not end on an aligned boundary. Merged the read/write "datum length"
5161 calculation code into a common procedure.
5163 Rolled in a couple of changes to the FreeBSD-specific header.
5166 Code and Data Size: Current and previous core subsystem library sizes are
5167 shown below. These are the code and data sizes for the acpica.lib produced
5168 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5169 any ACPI driver or OSPM code. The debug version of the code includes the
5170 debug output trace mechanism and has a much larger code and data size. Note
5171 that these values will vary depending on the efficiency of the compiler and
5172 the compiler options used during generation.
5175 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5176 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5178 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5179 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5182 2) iASL Compiler/Disassembler:
5184 Fixed a generation warning produced by some overly-verbose compilers for a
5187 ----------------------------------------
5188 14 May 2004. Summary of changes for version 20040514:
5190 1) ACPI CA Core Subsystem:
5192 Fixed a problem where hardware GPE enable bits sometimes not set properly
5193 during and after GPE method execution. Result of 04/27 changes.
5195 Removed extra "clear all GPEs" when sleeping/waking.
5197 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
5198 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
5199 the new AcpiEv* calls as appropriate.
5201 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
5202 now "Microsoft Windows NT" for maximum compatibility. However this can be
5203 changed by modifying the acconfig.h file.
5205 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
5206 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
5208 Run _INI methods on ThermalZone objects. This is against the ACPI
5209 specification, but there is apparently ASL code in the field that has these
5210 _INI methods, and apparently "other" AML interpreters execute them.
5212 Performed a full 16/32/64 bit lint that resulted in some small changes.
5214 Added a sleep simulation command to the AML debugger to test sleep code.
5216 Code and Data Size: Current and previous core subsystem library sizes are
5217 shown below. These are the code and data sizes for the acpica.lib produced
5218 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5219 any ACPI driver or OSPM code. The debug version of the code includes the
5220 debug output trace mechanism and has a much larger code and data size. Note
5221 that these values will vary depending on the efficiency of the compiler and
5222 the compiler options used during generation.
5225 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5226 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5228 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5229 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5231 ----------------------------------------
5232 27 April 2004. Summary of changes for version 20040427:
5234 1) ACPI CA Core Subsystem:
5236 Completed a major overhaul of the GPE handling within ACPI CA. There are
5237 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
5238 The only GPEs allowed to be combination wake/run are for button-style
5239 devices such as a control-method power button, control-method sleep button,
5240 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
5241 referenced by any _PRW methods are marked for "runtime" and hardware
5242 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
5243 (and disabled at runtime). However, at sleep time, only those GPEs that
5244 have been specifically enabled for wake via the AcpiEnableGpe interface will
5245 actually be hardware enabled.
5247 A new external interface has been added, AcpiSetGpeType(), that is meant to
5248 be used by device drivers to force a GPE to a particular type. It will be
5249 especially useful for the drivers for the button devices mentioned above.
5251 Completed restructuring of the ACPI CA initialization sequence so that
5252 default operation region handlers are installed before GPEs are initialized
5253 and the _PRW methods are executed. This will prevent errors when the _PRW
5254 methods attempt to access system memory or I/O space.
5256 GPE enable/disable no longer reads the GPE enable register. We now keep the
5257 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
5258 thus no longer depend on the hardware to maintain these bits.
5260 Always clear the wake status and fixed/GPE status bits before sleep, even
5263 Improved the AML debugger output for displaying the GPE blocks and their
5266 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
5269 Fixed a problem where the physical address was incorrectly calculated when
5270 the Load() operator was used to directly load from an Operation Region (vs.
5271 loading from a Field object.) Also added check for minimum table length for
5274 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
5277 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
5278 consistency with the other fields returned.
5280 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
5281 structure for each GPE in the system, so the size of this structure is
5284 CPU stack requirement reduction: Cleaned up the method execution and object
5285 evaluation paths so that now a parameter structure is passed, instead of
5286 copying the various method parameters over and over again.
5288 In evregion.c: Correctly exit and reenter the interpreter region if and
5289 only if dispatching an operation region request to a user-installed handler.
5290 Do not exit/reenter when dispatching to a default handler (e.g., default
5291 system memory or I/O handlers)
5294 Notes for updating drivers for the new GPE support. The following changes
5295 must be made to ACPI-related device drivers that are attached to one or more
5296 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
5298 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
5299 explicitly call AcpiEnableGpe.
5300 2) There is a new interface called AcpiSetGpeType. This should be called
5301 before enabling the GPE. Also, this interface will automatically disable
5302 the GPE if it is currently enabled.
5303 3) AcpiEnableGpe no longer supports a GPE type flag.
5305 Specific drivers that must be changed:
5307 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
5308 AeGpeHandler, NULL);
5309 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
5310 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
5312 2) Button Drivers (Power, Lid, Sleep):
5313 Run _PRW method under parent device
5314 If _PRW exists: /* This is a control-method button */
5315 Extract GPE number and possibly GpeDevice
5316 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
5317 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
5319 For all other devices that have _PRWs, we automatically set the GPE type to
5320 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
5321 must be done on a selective basis, usually requiring some kind of user app
5322 to allow the user to pick the wake devices.
5325 Code and Data Size: Current and previous core subsystem library sizes are
5326 shown below. These are the code and data sizes for the acpica.lib produced
5327 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5328 any ACPI driver or OSPM code. The debug version of the code includes the
5329 debug output trace mechanism and has a much larger code and data size. Note
5330 that these values will vary depending on the efficiency of the compiler and
5331 the compiler options used during generation.
5334 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5335 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5338 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5339 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5343 ----------------------------------------
5344 02 April 2004. Summary of changes for version 20040402:
5346 1) ACPI CA Core Subsystem:
5348 Fixed an interpreter problem where an indirect store through an ArgX
5349 parameter was incorrectly applying the "implicit conversion rules" during
5350 the store. From the ACPI specification: "If the target is a method local or
5351 argument (LocalX or ArgX), no conversion is performed and the result is
5352 stored directly to the target". The new behavior is to disable implicit
5353 conversion during ALL stores to an ArgX.
5355 Changed the behavior of the _PRW method scan to ignore any and all errors
5356 returned by a given _PRW. This prevents the scan from aborting from the
5357 failure of any single _PRW.
5359 Moved the runtime configuration parameters from the global init procedure to
5360 static variables in acglobal.h. This will allow the host to override the
5361 default values easily.
5363 Code and Data Size: Current and previous core subsystem library sizes are
5364 shown below. These are the code and data sizes for the acpica.lib produced
5365 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5366 any ACPI driver or OSPM code. The debug version of the code includes the
5367 debug output trace mechanism and has a much larger code and data size. Note
5368 that these values will vary depending on the efficiency of the compiler and
5369 the compiler options used during generation.
5372 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5373 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5375 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5376 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5379 2) iASL Compiler/Disassembler:
5381 iASL now fully disassembles SSDTs. However, External() statements are not
5382 generated automatically for unresolved symbols at this time. This is a
5383 planned feature for future implementation.
5385 Fixed a scoping problem in the disassembler that occurs when the type of the
5386 target of a Scope() operator is overridden. This problem caused an
5387 incorrectly nested internal namespace to be constructed.
5389 Any warnings or errors that are emitted during disassembly are now commented
5390 out automatically so that the resulting file can be recompiled without any
5393 ----------------------------------------
5394 26 March 2004. Summary of changes for version 20040326:
5396 1) ACPI CA Core Subsystem:
5398 Implemented support for "wake" GPEs via interaction between GPEs and the
5399 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
5400 identified as a WAKE GPE and by default will no longer be enabled at
5401 runtime. Previously, we were blindly enabling all GPEs with a corresponding
5402 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
5403 believe this has been the cause of thousands of "spurious" GPEs on some
5406 This new GPE behavior is can be reverted to the original behavior (enable
5407 ALL GPEs at runtime) via a runtime flag.
5409 Fixed a problem where aliased control methods could not access objects
5410 properly. The proper scope within the namespace was not initialized
5411 (transferred to the target of the aliased method) before executing the
5414 Fixed a potential race condition on internal object deletion on the return
5415 object in AcpiEvaluateObject.
5417 Integrated a fix for resource descriptors where both _MEM and _MTP were
5418 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5419 wide, 0x0F instead of 0x03.)
5421 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
5422 fault in some cases.
5424 Updated Notify() values for debug statements in evmisc.c
5426 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
5428 Code and Data Size: Current and previous core subsystem library sizes are
5429 shown below. These are the code and data sizes for the acpica.lib produced
5430 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5431 any ACPI driver or OSPM code. The debug version of the code includes the
5432 debug output trace mechanism and has a much larger code and data size. Note
5433 that these values will vary depending on the efficiency of the compiler and
5434 the compiler options used during generation.
5438 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5439 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5441 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5442 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5444 ----------------------------------------
5445 11 March 2004. Summary of changes for version 20040311:
5447 1) ACPI CA Core Subsystem:
5449 Fixed a problem where errors occurring during the parse phase of control
5450 method execution did not abort cleanly. For example, objects created and
5451 installed in the namespace were not deleted. This caused all subsequent
5452 invocations of the method to return the AE_ALREADY_EXISTS exception.
5454 Implemented a mechanism to force a control method to "Serialized" execution
5455 if the method attempts to create namespace objects. (The root of the
5456 AE_ALREADY_EXISTS problem.)
5458 Implemented support for the predefined _OSI "internal" control method.
5459 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
5460 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
5461 This feature will allow "other" operating systems to execute the fully
5462 tested, "Windows" code path through the ASL code
5464 Global Lock Support: Now allows multiple acquires and releases with any
5465 internal thread. Removed concept of "owning thread" for this special mutex.
5467 Fixed two functions that were inappropriately declaring large objects on the
5468 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
5469 method execution considerably.
5471 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
5472 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
5474 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
5475 defined on the machine.
5477 Implemented two runtime options: One to force all control method execution
5478 to "Serialized" to mimic Windows behavior, another to disable _OSI support
5479 if it causes problems on a given machine.
5481 Code and Data Size: Current and previous core subsystem library sizes are
5482 shown below. These are the code and data sizes for the acpica.lib produced
5483 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5484 any ACPI driver or OSPM code. The debug version of the code includes the
5485 debug output trace mechanism and has a much larger code and data size. Note
5486 that these values will vary depending on the efficiency of the compiler and
5487 the compiler options used during generation.
5490 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5491 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5493 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5494 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5496 2) iASL Compiler/Disassembler:
5498 Fixed an array size problem for FreeBSD that would cause the compiler to
5501 ----------------------------------------
5502 20 February 2004. Summary of changes for version 20040220:
5505 1) ACPI CA Core Subsystem:
5507 Implemented execution of _SxD methods for Device objects in the
5508 GetObjectInfo interface.
5510 Fixed calls to _SST method to pass the correct arguments.
5512 Added a call to _SST on wake to restore to "working" state.
5514 Check for End-Of-Buffer failure case in the WalkResources interface.
5516 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
5517 structures to the beginning of the file.
5519 After wake, clear GPE status register(s) before enabling GPEs.
5521 After wake, clear/enable power button. (Perhaps we should clear/enable all
5522 fixed events upon wake.)
5524 Fixed a couple of possible memory leaks in the Namespace manager.
5526 Integrated latest acnetbsd.h file.
5528 ----------------------------------------
5529 11 February 2004. Summary of changes for version 20040211:
5532 1) ACPI CA Core Subsystem:
5534 Completed investigation and implementation of the call-by-reference
5535 mechanism for control method arguments.
5537 Fixed a problem where a store of an object into an indexed package could
5538 fail if the store occurs within a different method than the method that
5539 created the package.
5541 Fixed a problem where the ToDecimal operator could return incorrect results.
5543 Fixed a problem where the CopyObject operator could fail on some of the more
5544 obscure objects (e.g., Reference objects.)
5546 Improved the output of the Debug object to display buffer, package, and
5549 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
5550 the expected result.
5552 Added permanent ACPI_REPORT_ERROR macros for all instances of the
5553 ACPI_AML_INTERNAL exception.
5555 Integrated latest version of acfreebsd.h
5557 ----------------------------------------
5558 16 January 2004. Summary of changes for version 20040116:
5560 The purpose of this release is primarily to update the copyright years in
5561 each module, thus causing a huge number of diffs. There are a few small
5562 functional changes, however.
5564 1) ACPI CA Core Subsystem:
5566 Improved error messages when there is a problem finding one or more of the
5567 required base ACPI tables
5569 Reintroduced the definition of APIC_HEADER in actbl.h
5571 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
5573 Removed extraneous reference to NewObj in dsmthdat.c
5577 Fixed a problem introduced in December that disabled the correct disassembly
5578 of Resource Templates
5581 ----------------------------------------
5582 03 December 2003. Summary of changes for version 20031203:
5584 1) ACPI CA Core Subsystem:
5586 Changed the initialization of Operation Regions during subsystem
5587 init to perform two entire walks of the ACPI namespace; The first
5588 to initialize the regions themselves, the second to execute the
5589 _REG methods. This fixed some interdependencies across _REG
5590 methods found on some machines.
5592 Fixed a problem where a Store(Local0, Local1) could simply update
5593 the object reference count, and not create a new copy of the
5594 object if the Local1 is uninitialized.
5596 Implemented support for the _SST reserved method during sleep
5599 Implemented support to clear the SLP_TYP and SLP_EN bits when
5600 waking up, this is apparently required by some machines.
5602 When sleeping, clear the wake status only if SleepState is not S5.
5604 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
5605 pointer arithmetic advanced a string pointer too far.
5607 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
5608 could be returned if the requested table has not been loaded.
5610 Within the support for IRQ resources, restructured the handling of
5611 the active and edge/level bits.
5613 Fixed a few problems in AcpiPsxExecute() where memory could be
5614 leaked under certain error conditions.
5616 Improved error messages for the cases where the ACPI mode could
5619 Code and Data Size: Current and previous core subsystem library
5620 sizes are shown below. These are the code and data sizes for the
5621 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5622 these values do not include any ACPI driver or OSPM code. The
5623 debug version of the code includes the debug output trace
5624 mechanism and has a much larger code and data size. Note that
5625 these values will vary depending on the efficiency of the compiler
5626 and the compiler options used during generation.
5628 Previous Release (20031029):
5629 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5630 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5632 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5633 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5635 2) iASL Compiler/Disassembler:
5637 Implemented a fix for the iASL disassembler where a bad index was
5638 generated. This was most noticeable on 64-bit platforms
5641 ----------------------------------------
5642 29 October 2003. Summary of changes for version 20031029:
5644 1) ACPI CA Core Subsystem:
5647 Fixed a problem where a level-triggered GPE with an associated
5648 _Lxx control method was incorrectly cleared twice.
5650 Fixed a problem with the Field support code where an access can
5651 occur beyond the end-of-region if the field is non-aligned but
5652 extends to the very end of the parent region (resulted in an
5653 AE_AML_REGION_LIMIT exception.)
5655 Fixed a problem with ACPI Fixed Events where an RT Clock handler
5656 would not get invoked on an RTC event. The RTC event bitmasks for
5657 the PM1 registers were not being initialized properly.
5659 Implemented support for executing _STA and _INI methods for
5660 Processor objects. Although this is currently not part of the
5661 ACPI specification, there is existing ASL code that depends on the
5662 init-time execution of these methods.
5664 Implemented and deployed a GetDescriptorName function to decode
5665 the various types of internal descriptors. Guards against null
5666 descriptors during debug output also.
5668 Implemented and deployed a GetNodeName function to extract the 4-
5669 character namespace node name. This function simplifies the debug
5670 and error output, as well as guarding against null pointers during
5673 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
5674 simplify the debug and error output of 64-bit integers. This
5675 macro replaces the HIDWORD and LODWORD macros for dumping these
5678 Updated the implementation of the Stall() operator to only call
5679 AcpiOsStall(), and also return an error if the operand is larger
5680 than 255. This preserves the required behavior of not
5681 relinquishing the processor, as would happen if AcpiOsSleep() was
5682 called for "long stalls".
5684 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
5685 initialized are now treated as NOOPs.
5687 Cleaned up a handful of warnings during 64-bit generation.
5689 Fixed a reported error where and incorrect GPE number was passed
5690 to the GPE dispatch handler. This value is only used for error
5691 output, however. Used this opportunity to clean up and streamline
5692 the GPE dispatch code.
5694 Code and Data Size: Current and previous core subsystem library
5695 sizes are shown below. These are the code and data sizes for the
5696 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5697 these values do not include any ACPI driver or OSPM code. The
5699 debug version of the code includes the debug output trace
5700 mechanism and has a much larger code and data size. Note that
5701 these values will vary depending on the efficiency of the compiler
5702 and the compiler options used during generation.
5704 Previous Release (20031002):
5705 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5706 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5708 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5709 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5712 2) iASL Compiler/Disassembler:
5714 Updated the iASL compiler to return an error if the operand to the
5715 Stall() operator is larger than 255.
5718 ----------------------------------------
5719 02 October 2003. Summary of changes for version 20031002:
5722 1) ACPI CA Core Subsystem:
5724 Fixed a problem with Index Fields where the index was not
5725 incremented for fields that require multiple writes to the
5726 index/data registers (Fields that are wider than the data
5729 Fixed a problem with all Field objects where a write could go
5730 beyond the end-of-field if the field was larger than the access
5731 granularity and therefore required multiple writes to complete the
5732 request. An extra write beyond the end of the field could happen
5735 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
5736 would incorrectly be returned if the width of the Data Register
5737 was larger than the specified field access width.
5739 Completed fixes for LoadTable() and Unload() and verified their
5740 operation. Implemented full support for the "DdbHandle" object
5741 throughout the ACPI CA subsystem.
5743 Implemented full support for the MADT and ECDT tables in the ACPI
5744 CA header files. Even though these tables are not directly
5745 consumed by ACPI CA, the header definitions are useful for ACPI
5748 Integrated resource descriptor fixes posted to the Linux ACPI
5749 list. This included checks for minimum descriptor length, and
5750 support for trailing NULL strings within descriptors that have
5751 optional string elements.
5753 Code and Data Size: Current and previous core subsystem library
5754 sizes are shown below. These are the code and data sizes for the
5755 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5756 these values do not include any ACPI driver or OSPM code. The
5757 debug version of the code includes the debug output trace
5758 mechanism and has a much larger code and data size. Note that
5759 these values will vary depending on the efficiency of the compiler
5760 and the compiler options used during generation.
5762 Previous Release (20030918):
5763 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5764 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5766 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5767 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5772 Implemented detection of non-ASCII characters within the input
5773 source ASL file. This catches attempts to compile binary (AML)
5774 files early in the compile, with an informative error message.
5776 Fixed a problem where the disassembler would fault if the output
5777 filename could not be generated or if the output file could not be
5780 ----------------------------------------
5781 18 September 2003. Summary of changes for version 20030918:
5784 1) ACPI CA Core Subsystem:
5786 Found and fixed a longstanding problem with the late execution of
5787 the various deferred AML opcodes (such as Operation Regions,
5788 Buffer Fields, Buffers, and Packages). If the name string
5789 specified for the name of the new object placed the object in a
5790 scope other than the current scope, the initialization/execution
5791 of the opcode failed. The solution to this problem was to
5792 implement a mechanism where the late execution of such opcodes
5793 does not attempt to lookup/create the name a second time in an
5794 incorrect scope. This fixes the "region size computed
5795 incorrectly" problem.
5797 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
5798 Global Lock AE_BAD_PARAMETER error.
5800 Fixed several 64-bit issues with prototypes, casting and data
5803 Removed duplicate prototype from acdisasm.h
5805 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
5807 Code and Data Size: Current and previous core subsystem library
5808 sizes are shown below. These are the code and data sizes for the
5809 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5810 these values do not include any ACPI driver or OSPM code. The
5811 debug version of the code includes the debug output trace
5812 mechanism and has a much larger code and data size. Note that
5813 these values will vary depending on the efficiency of the compiler
5814 and the compiler options used during generation.
5818 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5819 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5821 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5822 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5827 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
5828 correct sleep time in seconds.
5830 ----------------------------------------
5831 14 July 2003. Summary of changes for version 20030619:
5833 1) ACPI CA Core Subsystem:
5835 Parse SSDTs in order discovered, as opposed to reverse order
5838 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
5845 Dynamically allocate SDT list (suggested by Andi Kleen)
5847 proc function return value cleanups (Andi Kleen)
5849 Correctly handle NMI watchdog during long stalls (Andrew Morton)
5851 Make it so acpismp=force works (reported by Andrew Morton)
5854 ----------------------------------------
5855 19 June 2003. Summary of changes for version 20030619:
5857 1) ACPI CA Core Subsystem:
5859 Fix To/FromBCD, eliminating the need for an arch-specific #define.
5861 Do not acquire a semaphore in the S5 shutdown path.
5863 Fix ex_digits_needed for 0. (Takayoshi Kochi)
5865 Fix sleep/stall code reversal. (Andi Kleen)
5867 Revert a change having to do with control method calling
5872 acpiphp update (Takayoshi Kochi)
5874 Export acpi_disabled for sonypi (Stelian Pop)
5876 Mention acpismp=force in config help
5878 Re-add acpitable.c and acpismp=force. This improves backwards
5880 compatibility and also cleans up the code to a significant degree.
5882 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
5884 ----------------------------------------
5885 22 May 2003. Summary of changes for version 20030522:
5887 1) ACPI CA Core Subsystem:
5889 Found and fixed a reported problem where an AE_NOT_FOUND error
5890 occurred occasionally during _BST evaluation. This turned out to
5891 be an Owner ID allocation issue where a called method did not get
5892 a new ID assigned to it. Eventually, (after 64k calls), the Owner
5893 ID UINT16 would wraparound so that the ID would be the same as the
5894 caller's and the called method would delete the caller's
5897 Implemented extended error reporting for control methods that are
5898 aborted due to a run-time exception. Output includes the exact
5899 AML instruction that caused the method abort, a dump of the method
5900 locals and arguments at the time of the abort, and a trace of all
5901 nested control method calls.
5903 Modified the interpreter to allow the creation of buffers of zero
5904 length from the AML code. Implemented new code to ensure that no
5905 attempt is made to actually allocate a memory buffer (of length
5906 zero) - instead, a simple buffer object with a NULL buffer pointer
5907 and length zero is created. A warning is no longer issued when
5908 the AML attempts to create a zero-length buffer.
5910 Implemented a workaround for the "leading asterisk issue" in
5911 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
5912 asterisk is automatically removed if present in any HID, UID, or
5913 CID strings. The iASL compiler will still flag this asterisk as
5916 Implemented full support for _CID methods that return a package of
5917 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
5918 now additionally returns a device _CID list if present. This
5919 required a change to the external interface in order to pass an
5920 ACPI_BUFFER object as a parameter since the _CID list is of
5923 Fixed a problem with the new AE_SAME_HANDLER exception where
5924 handler initialization code did not know about this exception.
5926 Code and Data Size: Current and previous core subsystem library
5927 sizes are shown below. These are the code and data sizes for the
5928 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5929 these values do not include any ACPI driver or OSPM code. The
5930 debug version of the code includes the debug output trace
5931 mechanism and has a much larger code and data size. Note that
5932 these values will vary depending on the efficiency of the compiler
5933 and the compiler options used during generation.
5935 Previous Release (20030509):
5936 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5937 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5939 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5940 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5945 Fixed a bug in which we would reinitialize the ACPI interrupt
5946 after it was already working, thus disabling all ACPI and the IRQs
5947 for any other device sharing the interrupt. (Thanks to Stian
5950 Toshiba driver update (John Belmonte)
5952 Return only 0 or 1 for our interrupt handler status (Andrew
5958 Fixed a reported problem where multiple (nested) ElseIf()
5959 statements were not handled correctly by the compiler, resulting
5960 in incorrect warnings and incorrect AML code. This was a problem
5961 in both the ASL parser and the code generator.
5966 Added changes to existing interfaces, new exception codes, and new
5967 text concerning reference count object management versus garbage
5970 ----------------------------------------
5971 09 May 2003. Summary of changes for version 20030509.
5974 1) ACPI CA Core Subsystem:
5976 Changed the subsystem initialization sequence to hold off
5977 installation of address space handlers until the hardware has been
5978 initialized and the system has entered ACPI mode. This is because
5979 the installation of space handlers can cause _REG methods to be
5980 run. Previously, the _REG methods could potentially be run before
5981 ACPI mode was enabled.
5983 Fixed some memory leak issues related to address space handler and
5984 notify handler installation. There were some problems with the
5985 reference count mechanism caused by the fact that the handler
5986 objects are shared across several namespace objects.
5988 Fixed a reported problem where reference counts within the
5989 namespace were not properly updated when named objects created by
5990 method execution were deleted.
5992 Fixed a reported problem where multiple SSDTs caused a deletion
5993 issue during subsystem termination. Restructured the table data
5994 structures to simplify the linked lists and the related code.
5996 Fixed a problem where the table ID associated with secondary
5997 tables (SSDTs) was not being propagated into the namespace objects
5998 created by those tables. This would only present a problem for
5999 tables that are unloaded at run-time, however.
6001 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
6002 type as the length parameter (instead of UINT32).
6004 Solved a long-standing problem where an ALREADY_EXISTS error
6005 appears on various systems. This problem could happen when there
6006 are multiple PCI_Config operation regions under a single PCI root
6007 bus. This doesn't happen very frequently, but there are some
6008 systems that do this in the ASL.
6010 Fixed a reported problem where the internal DeleteNode function
6011 was incorrectly handling the case where a namespace node was the
6012 first in the parent's child list, and had additional peers (not
6013 the only child, but first in the list of children.)
6015 Code and Data Size: Current core subsystem library sizes are shown
6016 below. These are the code and data sizes for the acpica.lib
6017 produced by the Microsoft Visual C++ 6.0 compiler, and these
6018 values do not include any ACPI driver or OSPM code. The debug
6019 version of the code includes the debug output trace mechanism and
6020 has a much larger code and data size. Note that these values will
6021 vary depending on the efficiency of the compiler and the compiler
6022 options used during generation.
6025 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6026 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6028 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
6029 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
6034 Allow ":" in OS override string (Ducrot Bruno)
6036 Kobject fix (Greg KH)
6039 3 iASL Compiler/Disassembler:
6041 Fixed a problem in the generation of the C source code files (AML
6042 is emitted in C source statements for BIOS inclusion) where the
6043 Ascii dump that appears within a C comment at the end of each line
6044 could cause a compile time error if the AML sequence happens to
6045 have an open comment or close comment sequence embedded.
6048 ----------------------------------------
6049 24 April 2003. Summary of changes for version 20030424.
6052 1) ACPI CA Core Subsystem:
6054 Support for big-endian systems has been implemented. Most of the
6055 support has been invisibly added behind big-endian versions of the
6058 Fixed a problem in AcpiHwDisableGpeBlock() and
6059 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
6060 low level hardware write routine. The offset parameter was
6061 actually eliminated from the low level read/write routines because
6062 they had become obsolete.
6064 Fixed a problem where a handler object was deleted twice during
6065 the removal of a fixed event handler.
6070 A fix for SMP systems with link devices was contributed by
6074 (2.5) Return whether we handled the interrupt in our IRQ handler.
6075 (Linux ISRs no longer return void, so we can propagate the handler
6076 return value from the ACPI CA core back to the OS.)
6082 The ACPI CA Programmer Reference has been updated to reflect new
6083 interfaces and changes to existing interfaces.
6085 ----------------------------------------
6086 28 March 2003. Summary of changes for version 20030328.
6088 1) ACPI CA Core Subsystem:
6090 The GPE Block Device support has been completed. New interfaces
6091 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
6092 interfaces (enable, disable, clear, getstatus) have been split
6093 into separate interfaces for Fixed Events and General Purpose
6094 Events (GPEs) in order to support GPE Block Devices properly.
6096 Fixed a problem where the error message "Failed to acquire
6097 semaphore" would appear during operations on the embedded
6100 Code and Data Size: Current core subsystem library sizes are shown
6101 below. These are the code and data sizes for the acpica.lib
6102 produced by the Microsoft Visual C++ 6.0 compiler, and these
6103 values do not include any ACPI driver or OSPM code. The debug
6104 version of the code includes the debug output trace mechanism and
6105 has a much larger code and data size. Note that these values will
6106 vary depending on the efficiency of the compiler and the compiler
6107 options used during generation.
6110 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6111 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6113 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6114 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6117 ----------------------------------------
6118 28 February 2003. Summary of changes for version 20030228.
6121 1) ACPI CA Core Subsystem:
6123 The GPE handling and dispatch code has been completely overhauled
6124 in preparation for support of GPE Block Devices (ID ACPI0006).
6125 This affects internal data structures and code only; there should
6126 be no differences visible externally. One new file has been
6129 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
6130 fields that are used to determine the GPE block lengths. The
6131 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
6132 structures are ignored. This is per the ACPI specification but it
6133 isn't very clear. The full 256 Block 0/1 GPEs are now supported
6134 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
6136 In the SCI interrupt handler, removed the read of the PM1_CONTROL
6137 register to look at the SCI_EN bit. On some machines, this read
6138 causes an SMI event and greatly slows down SCI events. (This may
6139 in fact be the cause of slow battery status response on some
6142 Fixed a problem where a store of a NULL string to a package object
6143 could cause the premature deletion of the object. This was seen
6144 during execution of the battery _BIF method on some systems,
6145 resulting in no battery data being returned.
6147 Added AcpiWalkResources interface to simplify parsing of resource
6150 Code and Data Size: Current core subsystem library sizes are shown
6151 below. These are the code and data sizes for the acpica.lib
6152 produced by the Microsoft Visual C++ 6.0 compiler, and these
6153 values do not include any ACPI driver or OSPM code. The debug
6154 version of the code includes the debug output trace mechanism and
6155 has a much larger code and data size. Note that these values will
6156 vary depending on the efficiency of the compiler and the compiler
6157 options used during generation.
6160 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6161 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6163 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6164 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6169 S3 fixes (Ole Rohne)
6171 Update ACPI PHP driver with to use new acpi_walk_resource API
6174 Add S4BIOS support (Pavel Machek)
6176 Map in entire table before performing checksum (John Stultz)
6178 Expand the mem= cmdline to allow the specification of reserved and
6179 ACPI DATA blocks (Pavel Machek)
6181 Never use ACPI on VISWS
6183 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
6185 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
6186 causing us to think that some systems support C2 when they really
6189 Do not count processor objects for non-present CPUs (Thanks to
6195 Fixed a problem where ASL include files could not be found and
6198 Added support for the _PDC reserved name.
6201 ----------------------------------------
6202 22 January 2003. Summary of changes for version 20030122.
6205 1) ACPI CA Core Subsystem:
6207 Added a check for constructs of the form: Store (Local0, Local0)
6208 where Local0 is not initialized. Apparently, some BIOS
6209 programmers believe that this is a NOOP. Since this store doesn't
6210 do anything anyway, the new prototype behavior will ignore this
6211 error. This is a case where we can relax the strict checking in
6212 the interpreter in the name of compatibility.
6217 The AcpiSrc Source Conversion Utility has been released with the
6218 Linux package for the first time. This is the utility that is
6219 used to convert the ACPI CA base source code to the Linux version.
6221 (Both) Handle P_BLK lengths shorter than 6 more gracefully
6223 (Both) Move more headers to include/acpi, and delete an unused
6226 (Both) Move drivers/acpi/include directory to include/acpi
6228 (Both) Boot functions don't use cmdline, so don't pass it around
6230 (Both) Remove include of unused header (Adrian Bunk)
6232 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
6234 former now also includes the latter, acpiphp.h only needs the one,
6237 (2.5) Make it possible to select method of bios restoring after S3
6238 resume. [=> no more ugly ifdefs] (Pavel Machek)
6240 (2.5) Make proc write interfaces work (Pavel Machek)
6242 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
6244 (2.5) Break out ACPI Perf code into its own module, under cpufreq
6247 (2.4) S4BIOS support (Ducrot Bruno)
6249 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
6255 Added support to disassemble SSDT and PSDTs.
6257 Implemented support to obtain SSDTs from the Windows registry if
6261 ----------------------------------------
6262 09 January 2003. Summary of changes for version 20030109.
6264 1) ACPI CA Core Subsystem:
6266 Changed the behavior of the internal Buffer-to-String conversion
6267 function. The current ACPI specification states that the contents
6268 of the buffer are "converted to a string of two-character
6269 hexadecimal numbers, each separated by a space". Unfortunately,
6270 this definition is not backwards compatible with existing ACPI 1.0
6271 implementations (although the behavior was not defined in the ACPI
6272 1.0 specification). The new behavior simply copies data from the
6273 buffer to the string until a null character is found or the end of
6274 the buffer is reached. The new String object is always null
6275 terminated. This problem was seen during the generation of _BIF
6276 battery data where incorrect strings were returned for battery
6277 type, etc. This will also require an errata to the ACPI
6280 Renamed all instances of NATIVE_UINT and NATIVE_INT to
6281 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
6283 Copyright in all module headers (both Linux and non-Linux) has be
6286 Code and Data Size: Current core subsystem library sizes are shown
6287 below. These are the code and data sizes for the acpica.lib
6288 produced by the Microsoft Visual C++ 6.0 compiler, and these
6289 values do not include any ACPI driver or OSPM code. The debug
6290 version of the code includes the debug output trace mechanism and
6291 has a much larger code and data size. Note that these values will
6292 vary depending on the efficiency of the compiler and the compiler
6293 options used during generation.
6296 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6297 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6299 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6300 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6305 Fixed an oops on module insertion/removal (Matthew Tippett)
6307 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
6309 (2.5) Replace pr_debug (Randy Dunlap)
6311 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
6313 (Both) Eliminate spawning of thread from timer callback, in favor
6316 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
6318 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
6320 (Both) Add missing statics to button.c (Pavel Machek)
6322 Several changes have been made to the source code translation
6323 utility that generates the Linux Code in order to make the code
6326 All typedefs on structs and unions have been removed in keeping
6327 with the Linux coding style.
6329 Removed the non-Linux SourceSafe module revision number from each
6332 Completed major overhaul of symbols to be lowercased for linux.
6333 Doubled the number of symbols that are lowercased.
6335 Fixed a problem where identifiers within procedure headers and
6336 within quotes were not fully lower cased (they were left with a
6339 Some C macros whose only purpose is to allow the generation of 16-
6340 bit code are now completely removed in the Linux code, increasing
6341 readability and maintainability.
6343 ----------------------------------------
6345 12 December 2002. Summary of changes for version 20021212.
6348 1) ACPI CA Core Subsystem:
6350 Fixed a problem where the creation of a zero-length AML Buffer
6351 would cause a fault.
6353 Fixed a problem where a Buffer object that pointed to a static AML
6354 buffer (in an ACPI table) could inadvertently be deleted, causing
6357 Fixed a problem where a user buffer (passed in to the external
6358 ACPI CA interfaces) could be overwritten if the buffer was too
6359 small to complete the operation, causing memory corruption.
6361 Fixed a problem in the Buffer-to-String conversion code where a
6362 string of length one was always returned, regardless of the size
6363 of the input Buffer object.
6365 Removed the NATIVE_CHAR data type across the entire source due to
6366 lack of need and lack of consistent use.
6368 Code and Data Size: Current core subsystem library sizes are shown
6369 below. These are the code and data sizes for the acpica.lib
6370 produced by the Microsoft Visual C++ 6.0 compiler, and these
6371 values do not include any ACPI driver or OSPM code. The debug
6372 version of the code includes the debug output trace mechanism and
6373 has a much larger code and data size. Note that these values will
6374 vary depending on the efficiency of the compiler and the compiler
6375 options used during generation.
6378 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6379 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6381 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6382 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6385 ----------------------------------------
6386 05 December 2002. Summary of changes for version 20021205.
6388 1) ACPI CA Core Subsystem:
6390 Fixed a problem where a store to a String or Buffer object could
6391 cause corruption of the DSDT if the object type being stored was
6392 the same as the target object type and the length of the object
6393 being stored was equal to or smaller than the original (existing)
6394 target object. This was seen to cause corruption of battery _BIF
6395 buffers if the _BIF method modified the buffer on the fly.
6397 Fixed a problem where an internal error was generated if a control
6398 method invocation was used in an OperationRegion, Buffer, or
6399 Package declaration. This was caused by the deferred parsing of
6400 the control method and thus the deferred creation of the internal
6401 method object. The solution to this problem was to create the
6402 internal method object at the moment the method is encountered in
6403 the first pass - so that subsequent references to the method will
6404 able to obtain the required parameter count and thus properly
6405 parse the method invocation. This problem presented itself as an
6406 AE_AML_INTERNAL during the pass 1 parse phase during table load.
6408 Fixed a problem where the internal String object copy routine did
6409 not always allocate sufficient memory for the target String object
6410 and caused memory corruption. This problem was seen to cause
6411 "Allocation already present in list!" errors as memory allocation
6414 Implemented a new function for the evaluation of namespace objects
6415 that allows the specification of the allowable return object
6416 types. This simplifies a lot of code that checks for a return
6417 object of one or more specific objects returned from the
6418 evaluation (such as _STA, etc.) This may become and external
6419 function if it would be useful to ACPI-related drivers.
6421 Completed another round of prefixing #defines with "ACPI_" for
6424 Completed additional code restructuring to allow more modular
6425 linking for iASL compiler and AcpiExec. Several files were split
6426 creating new files. New files: nsparse.c dsinit.c evgpe.c
6428 Implemented an abort mechanism to terminate an executing control
6429 method via the AML debugger. This feature is useful for debugging
6430 control methods that depend (wait) for specific hardware
6433 Code and Data Size: Current core subsystem library sizes are shown
6434 below. These are the code and data sizes for the acpica.lib
6435 produced by the Microsoft Visual C++ 6.0 compiler, and these
6436 values do not include any ACPI driver or OSPM code. The debug
6437 version of the code includes the debug output trace mechanism and
6438 has a much larger code and data size. Note that these values will
6439 vary depending on the efficiency of the compiler and the compiler
6440 options used during generation.
6443 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6444 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6446 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6447 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6450 2) iASL Compiler/Disassembler
6452 Fixed a compiler code generation problem for "Interrupt" Resource
6453 Descriptors. If specified in the ASL, the optional "Resource
6454 Source Index" and "Resource Source" fields were not inserted into
6455 the correct location within the AML resource descriptor, creating
6456 an invalid descriptor.
6458 Fixed a disassembler problem for "Interrupt" resource descriptors.
6459 The optional "Resource Source Index" and "Resource Source" fields
6463 ----------------------------------------
6464 22 November 2002. Summary of changes for version 20021122.
6467 1) ACPI CA Core Subsystem:
6469 Fixed a reported problem where an object stored to a Method Local
6470 or Arg was not copied to a new object during the store - the
6471 object pointer was simply copied to the Local/Arg. This caused
6472 all subsequent operations on the Local/Arg to also affect the
6473 original source of the store operation.
6475 Fixed a problem where a store operation to a Method Local or Arg
6476 was not completed properly if the Local/Arg contained a reference
6477 (from RefOf) to a named field. The general-purpose store-to-
6478 namespace-node code is now used so that this case is handled
6481 Fixed a problem where the internal object copy routine would cause
6482 a protection fault if the object being copied was a Package and
6483 contained either 1) a NULL package element or 2) a nested sub-
6486 Fixed a problem with the GPE initialization that resulted from an
6487 ambiguity in the ACPI specification. One section of the
6488 specification states that both the address and length of the GPE
6489 block must be zero if the block is not supported. Another section
6490 implies that only the address need be zero if the block is not
6491 supported. The code has been changed so that both the address and
6492 the length must be non-zero to indicate a valid GPE block (i.e.,
6493 if either the address or the length is zero, the GPE block is
6496 Code and Data Size: Current core subsystem library sizes are shown
6497 below. These are the code and data sizes for the acpica.lib
6498 produced by the Microsoft Visual C++ 6.0 compiler, and these
6499 values do not include any ACPI driver or OSPM code. The debug
6500 version of the code includes the debug output trace mechanism and
6501 has a much larger code and data size. Note that these values will
6502 vary depending on the efficiency of the compiler and the compiler
6503 options used during generation.
6506 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6507 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6509 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6510 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6515 Cleaned up EC driver. Exported an external EC read/write
6516 interface. By going through this, other drivers (most notably
6517 sonypi) will be able to serialize access to the EC.
6520 3) iASL Compiler/Disassembler
6522 Implemented support to optionally generate include files for both
6523 ASM and C (the -i switch). This simplifies BIOS development by
6524 automatically creating include files that contain external
6525 declarations for the symbols that are created within the
6527 (optionally generated) ASM and C AML source files.
6530 ----------------------------------------
6531 15 November 2002. Summary of changes for version 20021115.
6533 1) ACPI CA Core Subsystem:
6535 Fixed a memory leak problem where an error during resolution of
6537 method arguments during a method invocation from another method
6538 failed to cleanup properly by deleting all successfully resolved
6541 Fixed a problem where the target of the Index() operator was not
6542 correctly constructed if the source object was a package. This
6543 problem has not been detected because the use of a target operand
6544 with Index() is very rare.
6546 Fixed a problem with the Index() operator where an attempt was
6547 made to delete the operand objects twice.
6549 Fixed a problem where an attempt was made to delete an operand
6550 twice during execution of the CondRefOf() operator if the target
6553 Implemented the first of perhaps several internal create object
6554 functions that create and initialize a specific object type. This
6555 consolidates duplicated code wherever the object is created, thus
6556 shrinking the size of the subsystem.
6558 Implemented improved debug/error messages for errors that occur
6559 during nested method invocations. All executing method pathnames
6560 are displayed (with the error) as the call stack is unwound - thus
6563 Fixed a problem introduced in the 10/02 release that caused
6564 premature deletion of a buffer object if a buffer was used as an
6565 ASL operand where an integer operand is required (Thus causing an
6566 implicit object conversion from Buffer to Integer.) The change in
6567 the 10/02 release was attempting to fix a memory leak (albeit
6570 Code and Data Size: Current core subsystem library sizes are shown
6571 below. These are the code and data sizes for the acpica.lib
6572 produced by the Microsoft Visual C++ 6.0 compiler, and these
6573 values do not include any ACPI driver or OSPM code. The debug
6574 version of the code includes the debug output trace mechanism and
6575 has a much larger code and data size. Note that these values will
6576 vary depending on the efficiency of the compiler and the compiler
6577 options used during generation.
6580 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6581 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6583 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6584 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6589 Changed the implementation of the ACPI semaphores to use down()
6590 instead of down_interruptable(). It is important that the
6591 execution of ACPI control methods not be interrupted by signals.
6592 Methods must run to completion, or the system may be left in an
6593 unknown/unstable state.
6595 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
6599 3) iASL Compiler/Disassembler
6602 Changed the default location of output files. All output files
6603 are now placed in the current directory by default instead of in
6604 the directory of the source file. This change may affect some
6605 existing makefiles, but it brings the behavior of the compiler in
6606 line with other similar tools. The location of the output files
6607 can be overridden with the -p command line switch.
6610 ----------------------------------------
6611 11 November 2002. Summary of changes for version 20021111.
6614 0) ACPI Specification 2.0B is released and is now available at:
6615 http://www.acpi.info/index.html
6618 1) ACPI CA Core Subsystem:
6620 Implemented support for the ACPI 2.0 SMBus Operation Regions.
6621 This includes the early detection and handoff of the request to
6622 the SMBus region handler (avoiding all of the complex field
6623 support code), and support for the bidirectional return packet
6624 from an SMBus write operation. This paves the way for the
6625 development of SMBus drivers in each host operating system.
6627 Fixed a problem where the semaphore WAIT_FOREVER constant was
6628 defined as 32 bits, but must be 16 bits according to the ACPI
6629 specification. This had the side effect of causing ASL
6630 Mutex/Event timeouts even though the ASL code requested a wait
6631 forever. Changed all internal references to the ACPI timeout
6632 parameter to 16 bits to prevent future problems. Changed the name
6633 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
6635 Code and Data Size: Current core subsystem library sizes are shown
6636 below. These are the code and data sizes for the acpica.lib
6637 produced by the Microsoft Visual C++ 6.0 compiler, and these
6638 values do not include any ACPI driver or OSPM code. The debug
6639 version of the code includes the debug output trace mechanism and
6640 has a much larger code and data size. Note that these values will
6641 vary depending on the efficiency of the compiler and the compiler
6642 options used during generation.
6645 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6646 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6648 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6649 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6654 Module loading/unloading fixes (John Cagle)
6657 3) iASL Compiler/Disassembler
6659 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
6661 Implemented support for the disassembly of all SMBus protocol
6662 keywords (SMBQuick, SMBWord, etc.)
6664 ----------------------------------------
6665 01 November 2002. Summary of changes for version 20021101.
6668 1) ACPI CA Core Subsystem:
6670 Fixed a problem where platforms that have a GPE1 block but no GPE0
6671 block were not handled correctly. This resulted in a "GPE
6672 overlap" error message. GPE0 is no longer required.
6674 Removed code added in the previous release that inserted nodes
6675 into the namespace in alphabetical order. This caused some side-
6676 effects on various machines. The root cause of the problem is
6677 still under investigation since in theory, the internal ordering
6678 of the namespace nodes should not matter.
6681 Enhanced error reporting for the case where a named object is not
6682 found during control method execution. The full ACPI namepath
6683 (name reference) of the object that was not found is displayed in
6686 Note: as a result of the overhaul of the namespace object types in
6687 the previous release, the namespace nodes for the predefined
6688 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
6689 instead of ACPI_TYPE_ANY. This simplifies the namespace
6690 management code but may affect code that walks the namespace tree
6691 looking for specific object types.
6693 Code and Data Size: Current core subsystem library sizes are shown
6694 below. These are the code and data sizes for the acpica.lib
6695 produced by the Microsoft Visual C++ 6.0 compiler, and these
6696 values do not include any ACPI driver or OSPM code. The debug
6697 version of the code includes the debug output trace mechanism and
6698 has a much larger code and data size. Note that these values will
6699 vary depending on the efficiency of the compiler and the compiler
6700 options used during generation.
6703 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6704 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6706 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6707 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6712 Fixed a problem introduced in the previous release where the
6713 Processor and Thermal objects were not recognized and installed in
6714 /proc. This was related to the scope type change described above.
6717 3) iASL Compiler/Disassembler
6719 Implemented the -g option to get all of the required ACPI tables
6720 from the registry and save them to files (Windows version of the
6721 compiler only.) The required tables are the FADT, FACS, and DSDT.
6723 Added ACPI table checksum validation during table disassembly in
6724 order to catch corrupted tables.
6727 ----------------------------------------
6728 22 October 2002. Summary of changes for version 20021022.
6730 1) ACPI CA Core Subsystem:
6732 Implemented a restriction on the Scope operator that the target
6733 must already exist in the namespace at the time the operator is
6734 encountered (during table load or method execution). In other
6735 words, forward references are not allowed and Scope() cannot
6736 create a new object. This changes the previous behavior where the
6737 interpreter would create the name if not found. This new behavior
6738 correctly enables the search-to-root algorithm during namespace
6739 lookup of the target name. Because of this upsearch, this fixes
6740 the known Compaq _SB_.OKEC problem and makes both the AML
6741 interpreter and iASL compiler compatible with other ACPI
6744 Completed a major overhaul of the internal ACPI object types for
6745 the ACPI Namespace and the associated operand objects. Many of
6746 these types had become obsolete with the introduction of the two-
6747 pass namespace load. This cleanup simplifies the code and makes
6748 the entire namespace load mechanism much clearer and easier to
6751 Improved debug output for tracking scope opening/closing to help
6752 diagnose scoping issues. The old scope name as well as the new
6753 scope name are displayed. Also improved error messages for
6754 problems with ASL Mutex objects and error messages for GPE
6757 Cleaned up the namespace dump code, removed obsolete code.
6759 All string output (for all namespace/object dumps) now uses the
6760 common ACPI string output procedure which handles escapes properly
6761 and does not emit non-printable characters.
6763 Fixed some issues with constants in the 64-bit version of the
6764 local C library (utclib.c)
6769 EC Driver: No longer attempts to acquire the Global Lock at
6773 3) iASL Compiler/Disassembler
6775 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
6776 2 opcodes outside of a control method. This means that the
6777 "executable" operators (versus the "namespace" operators) cannot
6778 be used at the table level; they can only be used within a control
6781 Implemented the restriction on the Scope() operator where the
6782 target must already exist in the namespace at the time the
6783 operator is encountered (during ASL compilation). In other words,
6784 forward references are not allowed and Scope() cannot create a new
6785 object. This makes the iASL compiler compatible with other ACPI
6786 implementations and makes the Scope() implementation adhere to the
6789 Fixed a problem where namepath optimization for the Alias operator
6790 was optimizing the wrong path (of the two namepaths.) This caused
6791 a "Missing alias link" error message.
6793 Fixed a problem where an "unknown reserved name" warning could be
6794 incorrectly generated for names like "_SB" when the trailing
6795 underscore is not used in the original ASL.
6797 Fixed a problem where the reserved name check did not handle
6798 NamePaths with multiple NameSegs correctly. The first nameseg of
6799 the NamePath was examined instead of the last NameSeg.
6802 ----------------------------------------
6804 02 October 2002. Summary of changes for this release.
6807 1) ACPI CA Core Subsystem version 20021002:
6809 Fixed a problem where a store/copy of a string to an existing
6810 string did not always set the string length properly in the String
6813 Fixed a reported problem with the ToString operator where the
6814 behavior was identical to the ToHexString operator instead of just
6815 simply converting a raw buffer to a string data type.
6817 Fixed a problem where CopyObject and the other "explicit"
6818 conversion operators were not updating the internal namespace node
6819 type as part of the store operation.
6821 Fixed a memory leak during implicit source operand conversion
6822 where the original object was not deleted if it was converted to a
6823 new object of a different type.
6825 Enhanced error messages for all problems associated with namespace
6826 lookups. Common procedure generates and prints the lookup name as
6827 well as the formatted status.
6829 Completed implementation of a new design for the Alias support
6830 within the namespace. The existing design did not handle the case
6831 where a new object was assigned to one of the two names due to the
6832 use of an explicit conversion operator, resulting in the two names
6833 pointing to two different objects. The new design simply points
6834 the Alias name to the original name node - not to the object.
6835 This results in a level of indirection that must be handled in the
6836 name resolution mechanism.
6838 Code and Data Size: Current core subsystem library sizes are shown
6839 below. These are the code and data sizes for the acpica.lib
6840 produced by the Microsoft Visual C++ 6.0 compiler, and these
6841 values do not include any ACPI driver or OSPM code. The debug
6842 version of the code includes the debug output trace mechanism and
6843 has a larger code and data size. Note that these values will vary
6844 depending on the efficiency of the compiler and the compiler
6845 options used during generation.
6848 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6849 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6851 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6852 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6857 Initialize thermal driver's timer before it is used. (Knut
6860 Allow handling negative celsius values. (Kochi Takayoshi)
6862 Fix thermal management and make trip points. R/W (Pavel Machek)
6864 Fix /proc/acpi/sleep. (P. Christeas)
6866 IA64 fixes. (David Mosberger)
6868 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
6870 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
6874 3) iASL Compiler/Disassembler
6876 Clarified some warning/error messages.
6879 ----------------------------------------
6880 18 September 2002. Summary of changes for this release.
6883 1) ACPI CA Core Subsystem version 20020918:
6885 Fixed a reported problem with reference chaining (via the Index()
6886 and RefOf() operators) in the ObjectType() and SizeOf() operators.
6887 The definition of these operators includes the dereferencing of
6888 all chained references to return information on the base object.
6890 Fixed a problem with stores to indexed package elements - the
6891 existing code would not complete the store if an "implicit
6892 conversion" was not performed. In other words, if the existing
6893 object (package element) was to be replaced completely, the code
6894 didn't handle this case.
6896 Relaxed typechecking on the ASL "Scope" operator to allow the
6897 target name to refer to an object of type Integer, String, or
6898 Buffer, in addition to the scoping object types (Device,
6899 predefined Scopes, Processor, PowerResource, and ThermalZone.)
6900 This allows existing AML code that has workarounds for a bug in
6901 Windows to function properly. A warning is issued, however. This
6902 affects both the AML interpreter and the iASL compiler. Below is
6903 an example of this type of ASL code:
6909 Fixed some reported problems with 64-bit integer support in the
6910 local implementation of C library functions (clib.c)
6915 Use ACPI fix map region instead of IOAPIC region, since it is
6916 undefined in non-SMP.
6918 Ensure that the SCI has the proper polarity and trigger, even on
6919 systems that do not have an interrupt override entry in the MADT.
6921 2.5 big driver reorganization (Pat Mochel)
6923 Use early table mapping code from acpitable.c (Andi Kleen)
6925 New blacklist entries (Andi Kleen)
6927 Blacklist improvements. Split blacklist code out into a separate
6928 file. Move checking the blacklist to very early. Previously, we
6929 would use ACPI tables, and then halfway through init, check the
6930 blacklist -- too late. Now, it's early enough to completely fall-
6934 3) iASL Compiler/Disassembler version 20020918:
6936 Fixed a problem where the typechecking code didn't know that an
6937 alias could point to a method. In other words, aliases were not
6938 being dereferenced during typechecking.
6941 ----------------------------------------
6942 29 August 2002. Summary of changes for this release.
6944 1) ACPI CA Core Subsystem Version 20020829:
6946 If the target of a Scope() operator already exists, it must be an
6947 object type that actually opens a scope -- such as a Device,
6948 Method, Scope, etc. This is a fatal runtime error. Similar error
6949 check has been added to the iASL compiler also.
6951 Tightened up the namespace load to disallow multiple names in the
6952 same scope. This previously was allowed if both objects were of
6953 the same type. (i.e., a lookup was the same as entering a new
6959 Ensure that the ACPI interrupt has the proper trigger and
6962 local_irq_disable is extraneous. (Matthew Wilcox)
6964 Make "acpi=off" actually do what it says, and not use the ACPI
6965 interpreter *or* the tables.
6967 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
6971 3) iASL Compiler/Disassembler Version 20020829:
6973 Implemented namepath optimization for name declarations. For
6974 example, a declaration like "Method (\_SB_.ABCD)" would get
6975 optimized to "Method (ABCD)" if the declaration is within the
6976 \_SB_ scope. This optimization is in addition to the named
6977 reference path optimization first released in the previous
6978 version. This would seem to complete all possible optimizations
6979 for namepaths within the ASL/AML.
6981 If the target of a Scope() operator already exists, it must be an
6982 object type that actually opens a scope -- such as a Device,
6985 Implemented a check and warning for unreachable code in the same
6986 block below a Return() statement.
6988 Fixed a problem where the listing file was not generated if the
6989 compiler aborted if the maximum error count was exceeded (200).
6991 Fixed a problem where the typechecking of method return values was
6992 broken. This includes the check for a return value when the
6993 method is invoked as a TermArg (a return value is expected.)
6995 Fixed a reported problem where EOF conditions during a quoted
6996 string or comment caused a fault.
6999 ----------------------------------------
7000 15 August 2002. Summary of changes for this release.
7002 1) ACPI CA Core Subsystem Version 20020815:
7004 Fixed a reported problem where a Store to a method argument that
7005 contains a reference did not perform the indirect store correctly.
7006 This problem was created during the conversion to the new
7007 reference object model - the indirect store to a method argument
7008 code was not updated to reflect the new model.
7010 Reworked the ACPI mode change code to better conform to ACPI 2.0,
7011 handle corner cases, and improve code legibility (Kochi Takayoshi)
7013 Fixed a problem with the pathname parsing for the carat (^)
7014 prefix. The heavy use of the carat operator by the new namepath
7015 optimization in the iASL compiler uncovered a problem with the AML
7016 interpreter handling of this prefix. In the case where one or
7017 more carats precede a single nameseg, the nameseg was treated as
7018 standalone and the search rule (to root) was inadvertently
7019 applied. This could cause both the iASL compiler and the
7020 interpreter to find the wrong object or to miss the error that
7021 should occur if the object does not exist at that exact pathname.
7023 Found and fixed the problem where the HP Pavilion DSDT would not
7024 load. This was a relatively minor tweak to the table loading code
7025 (a problem caused by the unexpected encounter with a method
7026 invocation not within a control method), but it does not solve the
7027 overall issue of the execution of AML code at the table level.
7028 This investigation is still ongoing.
7030 Code and Data Size: Current core subsystem library sizes are shown
7031 below. These are the code and data sizes for the acpica.lib
7032 produced by the Microsoft Visual C++ 6.0 compiler, and these
7033 values do not include any ACPI driver or OSPM code. The debug
7034 version of the code includes the debug output trace mechanism and
7035 has a larger code and data size. Note that these values will vary
7036 depending on the efficiency of the compiler and the compiler
7037 options used during generation.
7040 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7041 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7043 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7044 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7049 Remove redundant slab.h include (Brad Hards)
7051 Fix several bugs in thermal.c (Herbert Nachtnebel)
7053 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
7055 Change acpi_system_suspend to use updated irq functions (Pavel
7058 Export acpi_get_firmware_table (Matthew Wilcox)
7060 Use proper root proc entry for ACPI (Kochi Takayoshi)
7062 Fix early-boot table parsing (Bjorn Helgaas)
7065 3) iASL Compiler/Disassembler
7067 Reworked the compiler options to make them more consistent and to
7068 use two-letter options where appropriate. We were running out of
7069 sensible letters. This may break some makefiles, so check the
7070 current options list by invoking the compiler with no parameters.
7072 Completed the design and implementation of the ASL namepath
7073 optimization option for the compiler. This option optimizes all
7074 references to named objects to the shortest possible path. The
7075 first attempt tries to utilize a single nameseg (4 characters) and
7076 the "search-to-root" algorithm used by the interpreter. If that
7077 cannot be used (because either the name is not in the search path
7078 or there is a conflict with another object with the same name),
7079 the pathname is optimized using the carat prefix (usually a
7080 shorter string than specifying the entire path from the root.)
7082 Implemented support to obtain the DSDT from the Windows registry
7083 (when the disassembly option is specified with no input file).
7084 Added this code as the implementation for AcpiOsTableOverride in
7085 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
7086 utility) to scan memory for the DSDT to the AcpiOsTableOverride
7087 function in the DOS OSL to make the disassembler truly OS
7090 Implemented a new option to disassemble and compile in one step.
7091 When used without an input filename, this option will grab the
7092 DSDT from the local machine, disassemble it, and compile it in one
7095 Added a warning message for invalid escapes (a backslash followed
7096 by any character other than the allowable escapes). This catches
7097 the quoted string error "\_SB_" (which should be "\\_SB_" ).
7099 Also, there are numerous instances in the ACPI specification where
7102 Added a compiler option to disable all optimizations. This is
7103 basically the "compatibility mode" because by using this option,
7104 the AML code will come out exactly the same as other ASL
7107 Added error messages for incorrectly ordered dependent resource
7108 functions. This includes: missing EndDependentFn macro at end of
7109 dependent resource list, nested dependent function macros (both
7110 start and end), and missing StartDependentFn macro. These are
7111 common errors that should be caught at compile time.
7113 Implemented _OSI support for the disassembler and compiler. _OSI
7114 must be included in the namespace for proper disassembly (because
7115 the disassembler must know the number of arguments.)
7117 Added an "optimization" message type that is optional (off by
7118 default). This message is used for all optimizations - including
7119 constant folding, integer optimization, and namepath optimization.
7121 ----------------------------------------
7122 25 July 2002. Summary of changes for this release.
7125 1) ACPI CA Core Subsystem Version 20020725:
7127 The AML Disassembler has been enhanced to produce compilable ASL
7128 code and has been integrated into the iASL compiler (see below) as
7129 well as the single-step disassembly for the AML debugger and the
7130 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
7131 resource templates and macros are fully supported. The
7132 disassembler has been tested on over 30 different AML files,
7133 producing identical AML when the resulting disassembled ASL file
7134 is recompiled with the same ASL compiler.
7136 Modified the Resource Manager to allow zero interrupts and zero
7137 dma channels during the GetCurrentResources call. This was
7138 causing problems on some platforms.
7140 Added the AcpiOsRedirectOutput interface to the OSL to simplify
7141 output redirection for the AcpiOsPrintf and AcpiOsVprintf
7144 Code and Data Size: Current core subsystem library sizes are shown
7145 below. These are the code and data sizes for the acpica.lib
7146 produced by the Microsoft Visual C++ 6.0 compiler, and these
7147 values do not include any ACPI driver or OSPM code. The debug
7148 version of the code includes the debug output trace mechanism and
7149 has a larger code and data size. Note that these values will vary
7150 depending on the efficiency of the compiler and the compiler
7151 options used during generation.
7154 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7155 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7157 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7158 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7163 Fixed a panic in the EC driver (Dominik Brodowski)
7165 Implemented checksum of the R/XSDT itself during Linux table scan
7171 The AML disassembler is integrated into the compiler. The "-d"
7172 option invokes the disassembler to completely disassemble an
7173 input AML file, producing as output a text ASL file with the
7174 extension ".dsl" (to avoid name collisions with existing .asl
7175 source files.) A future enhancement will allow the disassembler
7176 to obtain the BIOS DSDT from the registry under Windows.
7178 Fixed a problem with the VendorShort and VendorLong resource
7179 descriptors where an invalid AML sequence was created.
7181 Implemented a fix for BufferData term in the ASL parser. It was
7182 inadvertently defined twice, allowing invalid syntax to pass and
7183 causing reduction conflicts.
7185 Fixed a problem where the Ones opcode could get converted to a
7186 value of zero if "Ones" was used where a byte, word or dword value
7187 was expected. The 64-bit value is now truncated to the correct
7188 size with the correct value.
7192 ----------------------------------------
7193 02 July 2002. Summary of changes for this release.
7196 1) ACPI CA Core Subsystem Version 20020702:
7198 The Table Manager code has been restructured to add several new
7199 features. Tables that are not required by the core subsystem
7200 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
7201 validated in any way and are returned from AcpiGetFirmwareTable if
7202 requested. The AcpiOsTableOverride interface is now called for
7203 each table that is loaded by the subsystem in order to allow the
7204 host to override any table it chooses. Previously, only the DSDT
7205 could be overridden. Added one new files, tbrsdt.c and
7208 Fixed a problem with the conversion of internal package objects to
7209 external objects (when a package is returned from a control
7210 method.) The return buffer length was set to zero instead of the
7211 proper length of the package object.
7213 Fixed a reported problem with the use of the RefOf and DeRefOf
7214 operators when passing reference arguments to control methods. A
7215 new type of Reference object is used internally for references
7216 produced by the RefOf operator.
7218 Added additional error messages in the Resource Manager to explain
7219 AE_BAD_DATA errors when they occur during resource parsing.
7221 Split the AcpiEnableSubsystem into two primitives to enable a
7222 finer granularity initialization sequence. These two calls should
7223 be called in this order: AcpiEnableSubsystem (flags),
7224 AcpiInitializeObjects (flags). The flags parameter remains the
7230 Updated the ACPI utilities module to understand the new style of
7231 fully resolved package objects that are now returned from the core
7232 subsystem. This eliminates errors of the form:
7234 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
7235 acpi_utils-0430 [145] acpi_evaluate_reference:
7236 Invalid element in package (not a device reference)
7238 The method evaluation utility uses the new buffer allocation
7239 scheme instead of calling AcpiEvaluate Object twice.
7241 Added support for ECDT. This allows the use of the Embedded
7243 Controller before the namespace has been fully initialized, which
7244 is necessary for ACPI 2.0 support, and for some laptops to
7245 initialize properly. (Laptops using ECDT are still rare, so only
7246 limited testing was performed of the added functionality.)
7248 Fixed memory leaks in the EC driver.
7250 Eliminated a brittle code structure in acpi_bus_init().
7252 Eliminated the acpi_evaluate() helper function in utils.c. It is
7253 no longer needed since acpi_evaluate_object can optionally
7254 allocate memory for the return object.
7256 Implemented fix for keyboard hang when getting battery readings on
7257 some systems (Stephen White)
7259 PCI IRQ routing update (Dominik Brodowski)
7261 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
7264 ----------------------------------------
7265 11 June 2002. Summary of changes for this release.
7268 1) ACPI CA Core Subsystem Version 20020611:
7270 Fixed a reported problem where constants such as Zero and One
7271 appearing within _PRT packages were not handled correctly within
7272 the resource manager code. Originally reported against the ASL
7273 compiler because the code generator now optimizes integers to
7274 their minimal AML representation (i.e. AML constants if possible.)
7275 The _PRT code now handles all AML constant opcodes correctly
7276 (Zero, One, Ones, Revision).
7278 Fixed a problem with the Concatenate operator in the AML
7279 interpreter where a buffer result object was incorrectly marked as
7280 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
7282 All package sub-objects are now fully resolved before they are
7283 returned from the external ACPI interfaces. This means that name
7284 strings are resolved to object handles, and constant operators
7285 (Zero, One, Ones, Revision) are resolved to Integers.
7287 Implemented immediate resolution of the AML Constant opcodes
7288 (Zero, One, Ones, Revision) to Integer objects upon detection
7289 within the AML stream. This has simplified and reduced the
7290 generated code size of the subsystem by eliminating about 10
7291 switch statements for these constants (which previously were
7292 contained in Reference objects.) The complicating issues are that
7293 the Zero opcode is used as a "placeholder" for unspecified
7294 optional target operands and stores to constants are defined to be
7297 Code and Data Size: Current core subsystem library sizes are shown
7298 below. These are the code and data sizes for the acpica.lib
7299 produced by the Microsoft Visual C++ 6.0 compiler, and these
7300 values do not include any ACPI driver or OSPM code. The debug
7301 version of the code includes the debug output trace mechanism and
7302 has a larger code and data size. Note that these values will vary
7303 depending on the efficiency of the compiler and the compiler
7304 options used during generation.
7307 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7308 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7310 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7311 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7317 Added preliminary support for obtaining _TRA data for PCI root
7318 bridges (Bjorn Helgaas).
7321 3) iASL Compiler Version X2046:
7323 Fixed a problem where the "_DDN" reserved name was defined to be a
7324 control method with one argument. There are no arguments, and
7325 _DDN does not have to be a control method.
7327 Fixed a problem with the Linux version of the compiler where the
7328 source lines printed with error messages were the wrong lines.
7329 This turned out to be the "LF versus CR/LF" difference between
7330 Windows and Unix. This appears to be the longstanding issue
7331 concerning listing output and error messages.
7333 Fixed a problem with the Linux version of compiler where opcode
7334 names within error messages were wrong. This was caused by a
7335 slight difference in the output of the Flex tool on Linux versus
7338 Fixed a problem with the Linux compiler where the hex output files
7339 contained some garbage data caused by an internal buffer overrun.
7342 ----------------------------------------
7343 17 May 2002. Summary of changes for this release.
7346 1) ACPI CA Core Subsystem Version 20020517:
7348 Implemented a workaround to an BIOS bug discovered on the HP
7349 OmniBook where the FADT revision number and the table size are
7350 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
7351 behavior is to fallback to using only the ACPI 1.0 fields of the
7352 FADT if the table is too small to be a ACPI 2.0 table as claimed
7353 by the revision number. Although this is a BIOS bug, this is a
7354 case where the workaround is simple enough and with no side
7355 effects, so it seemed prudent to add it. A warning message is
7358 Implemented minimum size checks for the fixed-length ACPI tables -
7359 - the FADT and FACS, as well as consistency checks between the
7360 revision number and the table size.
7362 Fixed a reported problem in the table override support where the
7363 new table pointer was incorrectly treated as a physical address
7364 instead of a logical address.
7366 Eliminated the use of the AE_AML_ERROR exception and replaced it
7367 with more descriptive codes.
7369 Fixed a problem where an exception would occur if an ASL Field was
7370 defined with no named Field Units underneath it (used by some
7373 Code and Data Size: Current core subsystem library sizes are shown
7374 below. These are the code and data sizes for the acpica.lib
7375 produced by the Microsoft Visual C++ 6.0 compiler, and these
7376 values do not include any ACPI driver or OSPM code. The debug
7377 version of the code includes the debug output trace mechanism and
7378 has a larger code and data size. Note that these values will vary
7379 depending on the efficiency of the compiler and the compiler
7380 options used during generation.
7383 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7384 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7386 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7387 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7393 Much work done on ACPI init (MADT and PCI IRQ routing support).
7394 (Paul D. and Dominik Brodowski)
7396 Fix PCI IRQ-related panic on boot (Sam Revitch)
7398 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
7400 Fix "MHz" typo (Dominik Brodowski)
7402 Fix RTC year 2000 issue (Dominik Brodowski)
7404 Preclude multiple button proc entries (Eric Brunet)
7406 Moved arch-specific code out of include/platform/aclinux.h
7408 3) iASL Compiler Version X2044:
7410 Implemented error checking for the string used in the EISAID macro
7411 (Usually used in the definition of the _HID object.) The code now
7412 strictly enforces the PnP format - exactly 7 characters, 3
7413 uppercase letters and 4 hex digits.
7415 If a raw string is used in the definition of the _HID object
7416 (instead of the EISAID macro), the string must contain all
7417 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7420 Implemented checking for invalid use of ACPI reserved names for
7421 most of the name creation operators (Name, Device, Event, Mutex,
7422 OperationRegion, PowerResource, Processor, and ThermalZone.)
7423 Previously, this check was only performed for control methods.
7425 Implemented an additional check on the Name operator to emit an
7426 error if a reserved name that must be implemented in ASL as a
7427 control method is used. We know that a reserved name must be a
7428 method if it is defined with input arguments.
7430 The warning emitted when a namespace object reference is not found
7431 during the cross reference phase has been changed into an error.
7432 The "External" directive should be used for names defined in other
7436 4) Tools and Utilities
7438 The 16-bit tools (adump16 and aexec16) have been regenerated and
7441 Fixed a problem with the output of both acpidump and adump16 where
7442 the indentation of closing parentheses and brackets was not
7444 aligned properly with the parent block.
7447 ----------------------------------------
7448 03 May 2002. Summary of changes for this release.
7451 1) ACPI CA Core Subsystem Version 20020503:
7453 Added support a new OSL interface that allows the host operating
7455 system software to override the DSDT found in the firmware -
7456 AcpiOsTableOverride. With this interface, the OSL can examine the
7457 version of the firmware DSDT and replace it with a different one
7460 Added new external interfaces for accessing ACPI registers from
7461 device drivers and other system software - AcpiGetRegister and
7462 AcpiSetRegister. This was simply an externalization of the
7463 existing AcpiHwBitRegister interfaces.
7465 Fixed a regression introduced in the previous build where the
7466 ASL/AML CreateField operator always returned an error,
7467 "destination must be a NS Node".
7469 Extended the maximum time (before failure) to successfully enable
7470 ACPI mode to 3 seconds.
7472 Code and Data Size: Current core subsystem library sizes are shown
7473 below. These are the code and data sizes for the acpica.lib
7474 produced by the Microsoft Visual C++ 6.0 compiler, and these
7475 values do not include any ACPI driver or OSPM code. The debug
7476 version of the code includes the debug output trace mechanism and
7477 has a larger code and data size. Note that these values will vary
7478 depending on the efficiency of the compiler and the compiler
7479 options used during generation.
7482 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7483 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7485 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7486 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7491 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
7492 free. While 3 out of 4 of our in-house systems work fine, the last
7493 one still hangs when testing the LAPIC timer.
7495 Renamed many files in 2.5 kernel release to omit "acpi_" from the
7498 Added warning on boot for Presario 711FR.
7500 Sleep improvements (Pavel Machek)
7502 ACPI can now be built without CONFIG_PCI enabled.
7504 IA64: Fixed memory map functions (JI Lee)
7507 3) iASL Compiler Version X2043:
7509 Added support to allow the compiler to be integrated into the MS
7510 VC++ development environment for one-button compilation of single
7511 files or entire projects -- with error-to-source-line mapping.
7513 Implemented support for compile-time constant folding for the
7514 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
7515 specification. This allows the ASL writer to use expressions
7516 instead of Integer/Buffer/String constants in terms that must
7517 evaluate to constants at compile time and will also simplify the
7518 emitted AML in any such sub-expressions that can be folded
7519 (evaluated at compile-time.) This increases the size of the
7520 compiler significantly because a portion of the ACPI CA AML
7521 interpreter is included within the compiler in order to pre-
7522 evaluate constant expressions.
7525 Fixed a problem with the "Unicode" ASL macro that caused the
7526 compiler to fault. (This macro is used in conjunction with the
7527 _STR reserved name.)
7529 Implemented an AML opcode optimization to use the Zero, One, and
7530 Ones opcodes where possible to further reduce the size of integer
7531 constants and thus reduce the overall size of the generated AML
7534 Implemented error checking for new reserved terms for ACPI version
7537 Implemented the -qr option to display the current list of ACPI
7538 reserved names known to the compiler.
7540 Implemented the -qc option to display the current list of ASL
7541 operators that are allowed within constant expressions and can
7542 therefore be folded at compile time if the operands are constants.
7547 Updated the Programmer's Reference for new interfaces, data types,
7548 and memory allocation model options.
7550 Updated the iASL Compiler User Reference to apply new format and
7551 add information about new features and options.
7553 ----------------------------------------
7554 19 April 2002. Summary of changes for this release.
7556 1) ACPI CA Core Subsystem Version 20020419:
7558 The source code base for the Core Subsystem has been completely
7559 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
7560 versions. The Lint option files used are included in the
7561 /acpi/generate/lint directory.
7563 Implemented enhanced status/error checking across the entire
7564 Hardware manager subsystem. Any hardware errors (reported from
7565 the OSL) are now bubbled up and will abort a running control
7569 Fixed a problem where the per-ACPI-table integer width (32 or 64)
7570 was stored only with control method nodes, causing a fault when
7571 non-control method code was executed during table loading. The
7572 solution implemented uses a global variable to indicate table
7573 width across the entire ACPI subsystem. Therefore, ACPI CA does
7574 not support mixed integer widths across different ACPI tables
7577 Fixed a problem where NULL extended fields (X fields) in an ACPI
7578 2.0 ACPI FADT caused the table load to fail. Although the
7579 existing ACPI specification is a bit fuzzy on this topic, the new
7580 behavior is to fall back on a ACPI 1.0 field if the corresponding
7581 ACPI 2.0 X field is zero (even though the table revision indicates
7582 a full ACPI 2.0 table.) The ACPI specification will be updated to
7585 Fixed a problem with the SystemMemory operation region handler
7586 where memory was always accessed byte-wise even if the AML-
7587 specified access width was larger than a byte. This caused
7588 problems on systems with memory-mapped I/O. Memory is now
7589 accessed with the width specified. On systems that do not support
7590 non-aligned transfers, a check is made to guarantee proper address
7591 alignment before proceeding in order to avoid an AML-caused
7592 alignment fault within the kernel.
7595 Fixed a problem with the ExtendedIrq resource where only one byte
7596 of the 4-byte Irq field was extracted.
7598 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
7599 function was out of date and required a rewrite.
7601 Code and Data Size: Current core subsystem library sizes are shown
7602 below. These are the code and data sizes for the acpica.lib
7603 produced by the Microsoft Visual C++ 6.0 compiler, and these
7604 values do not include any ACPI driver or OSPM code. The debug
7605 version of the code includes the debug output trace mechanism and
7606 has a larger code and data size. Note that these values will vary
7607 depending on the efficiency of the compiler and the compiler
7608 options used during generation.
7611 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7612 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7614 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7615 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7620 PCI IRQ routing fixes (Dominik Brodowski)
7623 3) iASL Compiler Version X2042:
7625 Implemented an additional compile-time error check for a field
7626 unit whose size + minimum access width would cause a run-time
7627 access beyond the end-of-region. Previously, only the field size
7630 The Core subsystem and iASL compiler now share a common parse
7631 object in preparation for compile-time evaluation of the type
7632 3/4/5 ASL operators.
7635 ----------------------------------------
7636 Summary of changes for this release: 03_29_02
7638 1) ACPI CA Core Subsystem Version 20020329:
7640 Implemented support for late evaluation of TermArg operands to
7641 Buffer and Package objects. This allows complex expressions to be
7642 used in the declarations of these object types.
7644 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
7645 1.0, if the field was larger than 32 bits, it was returned as a
7646 buffer - otherwise it was returned as an integer. In ACPI 2.0,
7647 the field is returned as a buffer only if the field is larger than
7648 64 bits. The TableRevision is now considered when making this
7649 conversion to avoid incompatibility with existing ASL code.
7651 Implemented logical addressing for AcpiOsGetRootPointer. This
7652 allows an RSDP with either a logical or physical address. With
7653 this support, the host OS can now override all ACPI tables with
7654 one logical RSDP. Includes implementation of "typed" pointer
7655 support to allow a common data type for both physical and logical
7656 pointers internally. This required a change to the
7657 AcpiOsGetRootPointer interface.
7659 Implemented the use of ACPI 2.0 Generic Address Structures for all
7660 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
7661 mapped I/O for these ACPI features.
7663 Initialization now ignores not only non-required tables (All
7664 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
7665 not validate the table headers of unrecognized tables.
7667 Fixed a problem where a notify handler could only be
7668 installed/removed on an object of type Device. All "notify"
7670 objects are now supported -- Devices, Processor, Power, and
7673 Removed most verbosity from the ACPI_DB_INFO debug level. Only
7674 critical information is returned when this debug level is enabled.
7676 Code and Data Size: Current core subsystem library sizes are shown
7677 below. These are the code and data sizes for the acpica.lib
7678 produced by the Microsoft Visual C++ 6.0 compiler, and these
7679 values do not include any ACPI driver or OSPM code. The debug
7680 version of the code includes the debug output trace mechanism and
7681 has a larger code and data size. Note that these values will vary
7682 depending on the efficiency of the compiler and the compiler
7683 options used during generation.
7686 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7687 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7689 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7690 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7695 The processor driver (acpi_processor.c) now fully supports ACPI
7696 2.0-based processor performance control (e.g. Intel(R)
7697 SpeedStep(TM) technology) Note that older laptops that only have
7698 the Intel "applet" interface are not supported through this. The
7699 'limit' and 'performance' interface (/proc) are fully functional.
7700 [Note that basic policy for controlling performance state
7701 transitions will be included in the next version of ospmd.] The
7702 idle handler was modified to more aggressively use C2, and PIIX4
7703 errata handling underwent a complete overhaul (big thanks to
7706 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
7707 based devices in the ACPI namespace are now dynamically bound
7708 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
7709 This allows, among other things, ACPI to resolve bus numbers for
7710 subordinate PCI bridges.
7712 Enhanced PCI IRQ routing to get the proper bus number for _PRT
7713 entries defined underneath PCI bridges.
7715 Added IBM 600E to bad bios list due to invalid _ADR value for
7716 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
7718 In the process of adding full MADT support (e.g. IOAPIC) for IA32
7719 (acpi.c, mpparse.c) -- stay tuned.
7721 Added back visual differentiation between fixed-feature and
7722 control-method buttons in dmesg. Buttons are also subtyped (e.g.
7723 button/power/PWRF) to simplify button identification.
7725 We no longer use -Wno-unused when compiling debug. Please ignore
7726 any "_THIS_MODULE defined but not used" messages.
7728 Can now shut down the system using "magic sysrq" key.
7731 3) iASL Compiler version 2041:
7733 Fixed a problem where conversion errors for hex/octal/decimal
7734 constants were not reported.
7736 Implemented a fix for the General Register template Address field.
7737 This field was 8 bits when it should be 64.
7739 Fixed a problem where errors/warnings were no longer being emitted
7740 within the listing output file.
7742 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
7743 exactly 4 characters, alphanumeric only.
7748 ----------------------------------------
7749 Summary of changes for this release: 03_08_02
7752 1) ACPI CA Core Subsystem Version 20020308:
7754 Fixed a problem with AML Fields where the use of the "AccessAny"
7755 keyword could cause an interpreter error due to attempting to read
7756 or write beyond the end of the parent Operation Region.
7758 Fixed a problem in the SystemMemory Operation Region handler where
7759 an attempt was made to map memory beyond the end of the region.
7760 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
7761 errors on some Linux systems.
7763 Fixed a problem where the interpreter/namespace "search to root"
7764 algorithm was not functioning for some object types. Relaxed the
7765 internal restriction on the search to allow upsearches for all
7766 external object types as well as most internal types.
7771 We now use safe_halt() macro versus individual calls to sti | hlt.
7773 Writing to the processor limit interface should now work. "echo 1"
7774 will increase the limit, 2 will decrease, and 0 will reset to the
7781 Fixed segfault on Linux version.
7784 ----------------------------------------
7785 Summary of changes for this release: 02_25_02
7787 1) ACPI CA Core Subsystem:
7790 Fixed a problem where the GPE bit masks were not initialized
7791 properly, causing erratic GPE behavior.
7793 Implemented limited support for multiple calling conventions. The
7794 code can be generated with either the VPL (variable parameter
7795 list, or "C") convention, or the FPL (fixed parameter list, or
7796 "Pascal") convention. The core subsystem is about 3.4% smaller
7797 when generated with FPL.
7802 Re-add some /proc/acpi/event functionality that was lost during
7805 Resolved issue with /proc events for fixed-feature buttons showing
7806 up as the system device.
7808 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
7810 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
7812 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
7814 Fixed limit interface & usage to fix bugs with passive cooling
7817 Restructured PRT support.
7820 ----------------------------------------
7821 Summary of changes for this label: 02_14_02
7824 1) ACPI CA Core Subsystem:
7826 Implemented support in AcpiLoadTable to allow loading of FACS and
7829 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
7830 been removed. All 64-bit platforms should be migrated to the ACPI
7831 2.0 tables. The actbl71.h header has been removed from the source
7834 All C macros defined within the subsystem have been prefixed with
7835 "ACPI_" to avoid collision with other system include files.
7837 Removed the return value for the two AcpiOsPrint interfaces, since
7838 it is never used and causes lint warnings for ignoring the return
7841 Added error checking to all internal mutex acquire and release
7842 calls. Although a failure from one of these interfaces is
7843 probably a fatal system error, these checks will cause the
7844 immediate abort of the currently executing method or interface.
7846 Fixed a problem where the AcpiSetCurrentResources interface could
7847 fault. This was a side effect of the deployment of the new memory
7850 Fixed a couple of problems with the Global Lock support introduced
7851 in the last major build. The "common" (1.0/2.0) internal FACS was
7852 being overwritten with the FACS signature and clobbering the
7853 Global Lock pointer. Also, the actual firmware FACS was being
7854 unmapped after construction of the "common" FACS, preventing
7855 access to the actual Global Lock field within it. The "common"
7856 internal FACS is no longer installed as an actual ACPI table; it
7857 is used simply as a global.
7859 Code and Data Size: Current core subsystem library sizes are shown
7860 below. These are the code and data sizes for the acpica.lib
7861 produced by the Microsoft Visual C++ 6.0 compiler, and these
7862 values do not include any ACPI driver or OSPM code. The debug
7863 version of the code includes the debug output trace mechanism and
7864 has a larger code and data size. Note that these values will vary
7865 depending on the efficiency of the compiler and the compiler
7866 options used during generation.
7868 Previous Release (02_07_01)
7869 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7870 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7872 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7873 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7878 Updated Linux-specific code for core macro and OSL interface
7879 changes described above.
7881 Improved /proc/acpi/event. It now can be opened only once and has
7882 proper poll functionality.
7884 Fixed and restructured power management (acpi_bus).
7886 Only create /proc "view by type" when devices of that class exist.
7888 Fixed "charging/discharging" bug (and others) in acpi_battery.
7890 Improved thermal zone code.
7893 3) ASL Compiler, version X2039:
7896 Implemented the new compiler restriction on ASL String hex/octal
7897 escapes to non-null, ASCII values. An error results if an invalid
7898 value is used. (This will require an ACPI 2.0 specification
7901 AML object labels that are output to the optional C and ASM source
7902 are now prefixed with both the ACPI table signature and table ID
7903 to help guarantee uniqueness within a large BIOS project.
7906 ----------------------------------------
7907 Summary of changes for this label: 02_01_02
7909 1) ACPI CA Core Subsystem:
7911 ACPI 2.0 support is complete in the entire Core Subsystem and the
7912 ASL compiler. All new ACPI 2.0 operators are implemented and all
7913 other changes for ACPI 2.0 support are complete. With
7914 simultaneous code and data optimizations throughout the subsystem,
7915 ACPI 2.0 support has been implemented with almost no additional
7916 cost in terms of code and data size.
7918 Implemented a new mechanism for allocation of return buffers. If
7919 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
7920 be allocated on behalf of the caller. Consolidated all return
7921 buffer validation and allocation to a common procedure. Return
7922 buffers will be allocated via the primary OSL allocation interface
7923 since it appears that a separate pool is not needed by most users.
7924 If a separate pool is required for these buffers, the caller can
7925 still use the original mechanism and pre-allocate the buffer(s).
7927 Implemented support for string operands within the DerefOf
7930 Restructured the Hardware and Event managers to be table driven,
7931 simplifying the source code and reducing the amount of generated
7934 Split the common read/write low-level ACPI register bitfield
7935 procedure into a separate read and write, simplifying the code
7938 Obsoleted the AcpiOsCallocate OSL interface. This interface was
7939 used only a handful of times and didn't have enough critical mass
7940 for a separate interface. Replaced with a common calloc procedure
7943 Fixed a reported problem with the GPE number mapping mechanism
7944 that allows GPE1 numbers to be non-contiguous with GPE0.
7945 Reorganized the GPE information and shrunk a large array that was
7946 originally large enough to hold info for all possible GPEs (256)
7947 to simply large enough to hold all GPEs up to the largest GPE
7948 number on the machine.
7950 Fixed a reported problem with resource structure alignment on 64-
7953 Changed the AcpiEnableEvent and AcpiDisableEvent external
7954 interfaces to not require any flags for the common case of
7955 enabling/disabling a GPE.
7957 Implemented support to allow a "Notify" on a Processor object.
7959 Most TBDs in comments within the source code have been resolved
7963 Fixed a problem in the interpreter where a standalone parent
7964 prefix (^) was not handled correctly in the interpreter and
7967 Removed obsolete and unnecessary GPE save/restore code.
7969 Implemented Field support in the ASL Load operator. This allows a
7970 table to be loaded from a named field, in addition to loading a
7971 table directly from an Operation Region.
7973 Implemented timeout and handle support in the external Global Lock
7976 Fixed a problem in the AcpiDump utility where pathnames were no
7977 longer being generated correctly during the dump of named objects.
7979 Modified the AML debugger to give a full display of if/while
7980 predicates instead of just one AML opcode at a time. (The
7981 predicate can have several nested ASL statements.) The old method
7982 was confusing during single stepping.
7984 Code and Data Size: Current core subsystem library sizes are shown
7985 below. These are the code and data sizes for the acpica.lib
7986 produced by the Microsoft Visual C++ 6.0 compiler, and these
7987 values do not include any ACPI driver or OSPM code. The debug
7988 version of the code includes the debug output trace mechanism and
7989 has a larger code and data size. Note that these values will vary
7990 depending on the efficiency of the compiler and the compiler
7991 options used during generation.
7993 Previous Release (12_18_01)
7994 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
7995 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
7997 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7998 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8002 Implemented fix for PIIX reverse throttling errata (Processor
8005 Added new Limit interface (Processor and Thermal drivers)
8007 New thermal policy (Thermal driver)
8009 Many updates to /proc
8011 Battery "low" event support (Battery driver)
8013 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
8015 IA32 - IA64 initialization unification, no longer experimental
8017 Menuconfig options redesigned
8019 3) ASL Compiler, version X2037:
8021 Implemented several new output features to simplify integration of
8022 AML code into firmware: 1) Output the AML in C source code with
8023 labels for each named ASL object. The original ASL source code
8024 is interleaved as C comments. 2) Output the AML in ASM source code
8025 with labels and interleaved ASL source. 3) Output the AML in
8026 raw hex table form, in either C or ASM.
8028 Implemented support for optional string parameters to the
8031 Completed support for embedded escape sequences within string
8032 literals. The compiler now supports all single character escapes
8033 as well as the Octal and Hex escapes. Note: the insertion of a
8034 null byte into a string literal (via the hex/octal escape) causes
8035 the string to be immediately terminated. A warning is issued.
8037 Fixed a problem where incorrect AML was generated for the case
8038 where an ASL namepath consists of a single parent prefix (
8040 ) with no trailing name segments.
8042 The compiler has been successfully generated with a 64-bit C
8048 ----------------------------------------
8049 Summary of changes for this label: 12_18_01
8053 Enhanced blacklist with reason and severity fields. Any table's
8054 signature may now be used to identify a blacklisted system.
8056 Call _PIC control method to inform the firmware which interrupt
8057 model the OS is using. Turn on any disabled link devices.
8059 Cleaned up busmgr /proc error handling (Andreas Dilger)
8061 2) ACPI CA Core Subsystem:
8063 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
8066 Completed implementation of the ACPI 2.0 "Continue",
8067 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
8068 operators. All new ACPI 2.0 operators are now implemented in both
8069 the ASL compiler and the AML interpreter. The only remaining ACPI
8070 2.0 task is support for the String data type in the DerefOf
8071 operator. Fixed a problem with AcquireMutex where the status code
8072 was lost if the caller had to actually wait for the mutex.
8074 Increased the maximum ASL Field size from 64K bits to 4G bits.
8076 Completed implementation of the external Global Lock interfaces --
8077 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
8078 Handler parameters were added.
8080 Completed another pass at removing warnings and issues when
8081 compiling with 64-bit compilers. The code now compiles cleanly
8082 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
8083 add and subtract (diff) macros have changed considerably.
8086 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
8087 64-bit platforms, 32-bits on all others. This type is used
8088 wherever memory allocation and/or the C sizeof() operator is used,
8089 and affects the OSL memory allocation interfaces AcpiOsAllocate
8090 and AcpiOsCallocate.
8092 Implemented sticky user breakpoints in the AML debugger.
8094 Code and Data Size: Current core subsystem library sizes are shown
8095 below. These are the code and data sizes for the acpica.lib
8096 produced by the Microsoft Visual C++ 6.0 compiler, and these
8097 values do not include any ACPI driver or OSPM code. The debug
8098 version of the code includes the debug output trace mechanism and
8099 has a larger code and data size. Note that these values will vary
8100 depending on the efficiency of the compiler and the compiler
8101 options used during generation.
8103 Previous Release (12_05_01)
8104 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8105 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8107 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8108 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8110 3) ASL Compiler, version X2034:
8112 Now checks for (and generates an error if detected) the use of a
8113 Break or Continue statement without an enclosing While statement.
8116 Successfully generated the compiler with the Intel 64-bit C
8119 ----------------------------------------
8120 Summary of changes for this label: 12_05_01
8122 1) ACPI CA Core Subsystem:
8124 The ACPI 2.0 CopyObject operator is fully implemented. This
8125 operator creates a new copy of an object (and is also used to
8126 bypass the "implicit conversion" mechanism of the Store operator.)
8128 The ACPI 2.0 semantics for the SizeOf operator are fully
8129 implemented. The change is that performing a SizeOf on a
8130 reference object causes an automatic dereference of the object to
8131 tha actual value before the size is evaluated. This behavior was
8132 undefined in ACPI 1.0.
8134 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
8135 have been implemented. The interrupt polarity and mode are now
8138 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
8139 appearing in Package objects were not properly converted to
8140 integers when the internal Package was converted to an external
8141 object (via the AcpiEvaluateObject interface.)
8143 Fixed a problem with the namespace object deletion mechanism for
8144 objects created by control methods. There were two parts to this
8145 problem: 1) Objects created during the initialization phase method
8146 parse were not being deleted, and 2) The object owner ID mechanism
8147 to track objects was broken.
8149 Fixed a problem where the use of the ASL Scope operator within a
8150 control method would result in an invalid opcode exception.
8152 Fixed a problem introduced in the previous label where the buffer
8153 length required for the _PRT structure was not being returned
8156 Code and Data Size: Current core subsystem library sizes are shown
8157 below. These are the code and data sizes for the acpica.lib
8158 produced by the Microsoft Visual C++ 6.0 compiler, and these
8159 values do not include any ACPI driver or OSPM code. The debug
8160 version of the code includes the debug output trace mechanism and
8161 has a larger code and data size. Note that these values will vary
8162 depending on the efficiency of the compiler and the compiler
8163 options used during generation.
8165 Previous Release (11_20_01)
8166 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8167 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8170 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8171 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8175 Updated all files to apply cleanly against 2.4.16.
8177 Added basic PCI Interrupt Routing Table (PRT) support for IA32
8178 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
8179 version supports both static and dyanmic PRT entries, but dynamic
8180 entries are treated as if they were static (not yet
8181 reconfigurable). Architecture- specific code to use this data is
8182 absent on IA32 but should be available shortly.
8184 Changed the initialization sequence to start the ACPI interpreter
8185 (acpi_init) prior to initialization of the PCI driver (pci_init)
8186 in init/main.c. This ordering is required to support PRT and
8187 facilitate other (future) enhancement. A side effect is that the
8188 ACPI bus driver and certain device drivers can no longer be loaded
8191 Modified the 'make menuconfig' options to allow PCI Interrupt
8192 Routing support to be included without the ACPI Bus and other
8195 3) ASL Compiler, version X2033:
8197 Fixed some issues with the use of the new CopyObject and
8198 DataTableRegion operators. Both are fully functional.
8200 ----------------------------------------
8201 Summary of changes for this label: 11_20_01
8203 20 November 2001. Summary of changes for this release.
8205 1) ACPI CA Core Subsystem:
8207 Updated Index support to match ACPI 2.0 semantics. Storing a
8208 Integer, String, or Buffer to an Index of a Buffer will store only
8209 the least-significant byte of the source to the Indexed buffer
8210 byte. Multiple writes are not performed.
8212 Fixed a problem where the access type used in an AccessAs ASL
8213 operator was not recorded correctly into the field object.
8215 Fixed a problem where ASL Event objects were created in a
8216 signalled state. Events are now created in an unsignalled state.
8218 The internal object cache is now purged after table loading and
8219 initialization to reduce the use of dynamic kernel memory -- on
8220 the assumption that object use is greatest during the parse phase
8221 of the entire table (versus the run-time use of individual control
8224 ACPI 2.0 variable-length packages are now fully operational.
8226 Code and Data Size: Code and Data optimizations have permitted new
8227 feature development with an actual reduction in the library size.
8228 Current core subsystem library sizes are shown below. These are
8229 the code and data sizes for the acpica.lib produced by the
8230 Microsoft Visual C++ 6.0 compiler, and these values do not include
8231 any ACPI driver or OSPM code. The debug version of the code
8232 includes the debug output trace mechanism and has a larger code
8233 and data size. Note that these values will vary depending on the
8234 efficiency of the compiler and the compiler options used during
8237 Previous Release (11_09_01):
8238 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8239 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8242 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8243 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8247 Enhanced the ACPI boot-time initialization code to allow the use
8248 of Local APIC tables for processor enumeration on IA-32, and to
8249 pave the way for a fully MPS-free boot (on SMP systems) in the
8250 near future. This functionality replaces
8251 arch/i386/kernel/acpitables.c, which was introduced in an earlier
8252 2.4.15-preX release. To enable this feature you must add
8253 "acpi_boot=on" to the kernel command line -- see the help entry
8254 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
8257 Restructured the configuration options to allow boot-time table
8258 parsing support without inclusion of the ACPI Interpreter (and
8261 NOTE: This release does not include fixes for the reported events,
8262 power-down, and thermal passive cooling issues (coming soon).
8266 Added additional typechecking for Fields within restricted access
8267 Operation Regions. All fields within EC and CMOS regions must be
8268 declared with ByteAcc. All fields withing SMBus regions must be
8269 declared with the BufferAcc access type.
8271 Fixed a problem where the listing file output of control methods
8272 no longer interleaved the actual AML code with the ASL source
8278 ----------------------------------------
8279 Summary of changes for this label: 11_09_01
8281 1) ACPI CA Core Subsystem:
8283 Implemented ACPI 2.0-defined support for writes to fields with a
8284 Buffer, String, or Integer source operand that is smaller than the
8285 target field. In these cases, the source operand is zero-extended
8286 to fill the target field.
8288 Fixed a problem where a Field starting bit offset (within the
8289 parent operation region) was calculated incorrectly if the
8291 alignment of the field differed from the access width. This
8292 affected CreateWordField, CreateDwordField, CreateQwordField, and
8293 possibly other fields that use the "AccessAny" keyword.
8295 Fixed a problem introduced in the 11_02_01 release where indirect
8296 stores through method arguments did not operate correctly.
8300 Implemented boot-time ACPI table parsing support
8301 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
8302 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
8303 legacy BIOS interfaces (e.g. MPS) for the configuration of system
8304 processors, memory, and interrupts during setup_arch(). Note that
8305 this patch does not include the required architecture-specific
8306 changes required to apply this information -- subsequent patches
8307 will be posted for both IA32 and IA64 to achieve this.
8309 Added low-level sleep support for IA32 platforms, courtesy of Pat
8310 Mochel. This allows IA32 systems to transition to/from various
8311 sleeping states (e.g. S1, S3), although the lack of a centralized
8312 driver model and power-manageable drivers will prevent its
8313 (successful) use on most systems.
8315 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
8316 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
8317 tables" option, etc.
8319 Increased the default timeout for the EC driver from 1ms to 10ms
8320 (1000 cycles of 10us) to try to address AE_TIME errors during EC
8323 ----------------------------------------
8324 Summary of changes for this label: 11_02_01
8326 1) ACPI CA Core Subsystem:
8328 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
8329 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
8332 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
8333 changes to support ACPI 2.0 Qword field access. Read/Write
8334 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
8335 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
8336 the value parameter for the address space handler interface is now
8337 an ACPI_INTEGER. OSL implementations of these interfaces must now
8338 handle the case where the Width parameter is 64.
8340 Index Fields: Fixed a problem where unaligned bit assembly and
8341 disassembly for IndexFields was not supported correctly.
8343 Index and Bank Fields: Nested Index and Bank Fields are now
8344 supported. During field access, a check is performed to ensure
8345 that the value written to an Index or Bank register is not out of
8346 the range of the register. The Index (or Bank) register is
8347 written before each access to the field data. Future support will
8348 include allowing individual IndexFields to be wider than the
8351 Fields: Fixed a problem where the AML interpreter was incorrectly
8352 attempting to write beyond the end of a Field/OpRegion. This was
8353 a boundary case that occurred when a DWORD field was written to a
8354 BYTE access OpRegion, forcing multiple writes and causing the
8355 interpreter to write one datum too many.
8357 Fields: Fixed a problem with Field/OpRegion access where the
8358 starting bit address of a field was incorrectly calculated if the
8359 current access type was wider than a byte (WordAcc, DwordAcc, or
8362 Fields: Fixed a problem where forward references to individual
8363 FieldUnits (individual Field names within a Field definition) were
8364 not resolved during the AML table load.
8366 Fields: Fixed a problem where forward references from a Field
8367 definition to the parent Operation Region definition were not
8368 resolved during the AML table load.
8370 Fields: Duplicate FieldUnit names within a scope are now detected
8371 during AML table load.
8373 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
8374 returned an incorrect name for the root node.
8376 Code and Data Size: Code and Data optimizations have permitted new
8377 feature development with an actual reduction in the library size.
8378 Current core subsystem library sizes are shown below. These are
8379 the code and data sizes for the acpica.lib produced by the
8380 Microsoft Visual C++ 6.0 compiler, and these values do not include
8381 any ACPI driver or OSPM code. The debug version of the code
8382 includes the debug output trace mechanism and has a larger code
8383 and data size. Note that these values will vary depending on the
8384 efficiency of the compiler and the compiler options used during
8387 Previous Release (10_18_01):
8388 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8389 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8392 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8393 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8397 Improved /proc processor output (Pavel Machek) Re-added
8398 MODULE_LICENSE("GPL") to all modules.
8400 3) ASL Compiler version X2030:
8402 Duplicate FieldUnit names within a scope are now detected and
8407 Programmer Reference updated to reflect OSL and address space
8408 handler interface changes described above.
8410 ----------------------------------------
8411 Summary of changes for this label: 10_18_01
8413 ACPI CA Core Subsystem:
8415 Fixed a problem with the internal object reference count mechanism
8416 that occasionally caused premature object deletion. This resolves
8417 all of the outstanding problem reports where an object is deleted
8418 in the middle of an interpreter evaluation. Although this problem
8419 only showed up in rather obscure cases, the solution to the
8420 problem involved an adjustment of all reference counts involving
8421 objects attached to namespace nodes.
8423 Fixed a problem with Field support in the interpreter where
8424 writing to an aligned field whose length is an exact multiple (2
8425 or greater) of the field access granularity would cause an attempt
8426 to write beyond the end of the field.
8428 The top level AML opcode execution functions within the
8429 interpreter have been renamed with a more meaningful and
8430 consistent naming convention. The modules exmonad.c and
8431 exdyadic.c were eliminated. New modules are exoparg1.c,
8432 exoparg2.c, exoparg3.c, and exoparg6.c.
8434 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
8436 Fixed a problem where the AML debugger was causing some internal
8437 objects to not be deleted during subsystem termination.
8439 Fixed a problem with the external AcpiEvaluateObject interface
8440 where the subsystem would fault if the named object to be
8441 evaluated refered to a constant such as Zero, Ones, etc.
8443 Fixed a problem with IndexFields and BankFields where the
8444 subsystem would fault if the index, data, or bank registers were
8445 not defined in the same scope as the field itself.
8447 Added printf format string checking for compilers that support
8448 this feature. Corrected more than 50 instances of issues with
8449 format specifiers within invocations of ACPI_DEBUG_PRINT
8450 throughout the core subsystem code.
8452 The ASL "Revision" operator now returns the ACPI support level
8453 implemented in the core - the value "2" since the ACPI 2.0 support
8454 is more than 50% implemented.
8456 Enhanced the output of the AML debugger "dump namespace" command
8457 to output in a more human-readable form.
8459 Current core subsystem library code sizes are shown below. These
8461 are the code and data sizes for the acpica.lib produced by the
8462 Microsoft Visual C++ 6.0 compiler, and these values do not include
8463 any ACPI driver or OSPM code. The debug version of the code
8464 includes the full debug trace mechanism -- leading to a much
8466 larger code and data size. Note that these values will vary
8467 depending on the efficiency of the compiler and the compiler
8468 options used during generation.
8470 Previous Label (09_20_01):
8471 Non-Debug Version: 65K Code, 5K Data, 70K Total
8472 Debug Version: 138K Code, 58K Data, 196K Total
8476 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8477 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8481 Implemented a "Bad BIOS Blacklist" to track machines that have
8482 known ASL/AML problems.
8484 Enhanced the /proc interface for the thermal zone driver and added
8485 support for _HOT (the critical suspend trip point). The 'info'
8486 file now includes threshold/policy information, and allows setting
8487 of _SCP (cooling preference) and _TZP (polling frequency) values
8488 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
8489 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
8490 preference to the passive/quiet mode (if supported by the ASL).
8492 Implemented a workaround for a gcc bug that resuted in an OOPs
8493 when loading the control method battery driver.
8495 ----------------------------------------
8496 Summary of changes for this label: 09_20_01
8498 ACPI CA Core Subsystem:
8500 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
8501 modified to allow individual GPE levels to be flagged as wake-
8502 enabled (i.e., these GPEs are to remain enabled when the platform
8505 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
8506 support wake-enabled GPEs. This means that upon entering the
8507 sleep state, all GPEs that are not wake-enabled are disabled.
8508 When leaving the sleep state, these GPEs are reenabled.
8510 A local double-precision divide/modulo module has been added to
8511 enhance portability to OS kernels where a 64-bit math library is
8512 not available. The new module is "utmath.c".
8514 Several optimizations have been made to reduce the use of CPU
8515 stack. Originally over 2K, the maximum stack usage is now below
8516 2K at 1860 bytes (1.82k)
8518 Fixed a problem with the AcpiGetFirmwareTable interface where the
8519 root table pointer was not mapped into a logical address properly.
8521 Fixed a problem where a NULL pointer was being dereferenced in the
8522 interpreter code for the ASL Notify operator.
8524 Fixed a problem where the use of the ASL Revision operator
8525 returned an error. This operator now returns the current version
8526 of the ACPI CA core subsystem.
8528 Fixed a problem where objects passed as control method parameters
8529 to AcpiEvaluateObject were always deleted at method termination.
8530 However, these objects may end up being stored into the namespace
8531 by the called method. The object reference count mechanism was
8532 applied to these objects instead of a force delete.
8534 Fixed a problem where static strings or buffers (contained in the
8535 AML code) that are declared as package elements within the ASL
8536 code could cause a fault because the interpreter would attempt to
8537 delete them. These objects are now marked with the "static
8538 object" flag to prevent any attempt to delete them.
8540 Implemented an interpreter optimization to use operands directly
8541 from the state object instead of extracting the operands to local
8542 variables. This reduces stack use and code size, and improves
8545 The module exxface.c was eliminated as it was an unnecessary extra
8548 Current core subsystem library code sizes are shown below. These
8549 are the code and data sizes for the acpica.lib produced by the
8550 Microsoft Visual C++ 6.0 compiler, and these values do not include
8551 any ACPI driver or OSPM code. The debug version of the code
8552 includes the full debug trace mechanism -- leading to a much
8553 larger code and data size. Note that these values will vary
8554 depending on the efficiency of the compiler and the compiler
8555 options used during generation.
8557 Non-Debug Version: 65K Code, 5K Data, 70K Total
8558 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
8559 Total (Previously 195K)
8563 Support for ACPI 2.0 64-bit integers has been added. All ACPI
8564 Integer objects are now 64 bits wide
8566 All Acpi data types and structures are now in lower case. Only
8567 Acpi macros are upper case for differentiation.
8571 Changes to the external interfaces as described above.
8573 ----------------------------------------
8574 Summary of changes for this label: 08_31_01
8576 ACPI CA Core Subsystem:
8578 A bug with interpreter implementation of the ASL Divide operator
8579 was found and fixed. The implicit function return value (not the
8580 explicit store operands) was returning the remainder instead of
8581 the quotient. This was a longstanding bug and it fixes several
8582 known outstanding issues on various platforms.
8584 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
8585 been further optimized for size. There are 700 invocations of the
8586 DEBUG_PRINT macro alone, so each optimization reduces the size of
8587 the debug version of the subsystem significantly.
8589 A stack trace mechanism has been implemented. The maximum stack
8590 usage is about 2K on 32-bit platforms. The debugger command "stat
8591 stack" will display the current maximum stack usage.
8593 All public symbols and global variables within the subsystem are
8594 now prefixed with the string "Acpi". This keeps all of the
8595 symbols grouped together in a kernel map, and avoids conflicts
8596 with other kernel subsystems.
8598 Most of the internal fixed lookup tables have been moved into the
8599 code segment via the const operator.
8601 Several enhancements have been made to the interpreter to both
8602 reduce the code size and improve performance.
8604 Current core subsystem library code sizes are shown below. These
8605 are the code and data sizes for the acpica.lib produced by the
8606 Microsoft Visual C++ 6.0 compiler, and these values do not include
8607 any ACPI driver or OSPM code. The debug version of the code
8608 includes the full debug trace mechanism which contains over 700
8609 invocations of the DEBUG_PRINT macro, 500 function entry macro
8610 invocations, and over 900 function exit macro invocations --
8611 leading to a much larger code and data size. Note that these
8612 values will vary depending on the efficiency of the compiler and
8613 the compiler options used during generation.
8615 Non-Debug Version: 64K Code, 5K Data, 69K Total
8616 Debug Version: 137K Code, 58K Data, 195K Total
8620 Implemented wbinvd() macro, pending a kernel-wide definition.
8622 Fixed /proc/acpi/event to handle poll() and short reads.
8624 ASL Compiler, version X2026:
8626 Fixed a problem introduced in the previous label where the AML
8628 code emitted for package objects produced packages with zero
8631 ----------------------------------------
8632 Summary of changes for this label: 08_16_01
8634 ACPI CA Core Subsystem:
8636 The following ACPI 2.0 ASL operators have been implemented in the
8637 AML interpreter (These are already supported by the Intel ASL
8638 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
8639 ToBuffer. Support for 64-bit AML constants is implemented in the
8640 AML parser, debugger, and disassembler.
8642 The internal memory tracking mechanism (leak detection code) has
8643 been upgraded to reduce the memory overhead (a separate tracking
8644 block is no longer allocated for each memory allocation), and now
8645 supports all of the internal object caches.
8647 The data structures and code for the internal object caches have
8648 been coelesced and optimized so that there is a single cache and
8649 memory list data structure and a single group of functions that
8650 implement generic cache management. This has reduced the code
8651 size in both the debug and release versions of the subsystem.
8653 The DEBUG_PRINT macro(s) have been optimized for size and replaced
8654 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
8655 different, because it generates a single call to an internal
8656 function. This results in a savings of about 90 bytes per
8657 invocation, resulting in an overall code and data savings of about
8658 16% in the debug version of the subsystem.
8662 Fixed C3 disk corruption problems and re-enabled C3 on supporting
8665 Integrated low-level sleep code by Patrick Mochel.
8667 Further tweaked source code Linuxization.
8673 Support for ACPI 2.0 variable length packages is fixed/completed.
8675 Fixed a problem where the optional length parameter for the ACPI
8676 2.0 ToString operator.
8678 Fixed multiple extraneous error messages when a syntax error is
8679 detected within the declaration line of a control method.
8681 ----------------------------------------
8682 Summary of changes for this label: 07_17_01
8684 ACPI CA Core Subsystem:
8686 Added a new interface named AcpiGetFirmwareTable to obtain any
8687 ACPI table via the ACPI signature. The interface can be called at
8688 any time during kernel initialization, even before the kernel
8689 virtual memory manager is initialized and paging is enabled. This
8690 allows kernel subsystems to obtain ACPI tables very early, even
8691 before the ACPI CA subsystem is initialized.
8693 Fixed a problem where Fields defined with the AnyAcc attribute
8694 could be resolved to the incorrect address under the following
8695 conditions: 1) the field width is larger than 8 bits and 2) the
8696 parent operation region is not defined on a DWORD boundary.
8698 Fixed a problem where the interpreter is not being locked during
8699 namespace initialization (during execution of the _INI control
8700 methods), causing an error when an attempt is made to release it
8703 ACPI 2.0 support in the AML Interpreter has begun and will be
8704 ongoing throughout the rest of this year. In this label, The Mod
8705 operator is implemented.
8707 Added a new data type to contain full PCI addresses named
8708 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
8709 and Function values.
8713 Enhanced the Linux version of the source code to change most
8714 capitalized ACPI type names to lowercase. For example, all
8715 instances of ACPI_STATUS are changed to acpi_status. This will
8716 result in a large diff, but the change is strictly cosmetic and
8717 aligns the CA code closer to the Linux coding standard.
8721 The interfaces to the PCI configuration space have been changed to
8722 add the PCI Segment number and to split the single 32-bit combined
8723 DeviceFunction field into two 16-bit fields. This was
8724 accomplished by moving the four values that define an address in
8725 PCI configuration space (segment, bus, device, and function) to
8726 the new ACPI_PCI_ID structure.
8728 The changes to the PCI configuration space interfaces led to a
8729 reexamination of the complete set of address space access
8730 interfaces for PCI, I/O, and Memory. The previously existing 18
8731 interfaces have proven difficult to maintain (any small change
8732 must be propagated across at least 6 interfaces) and do not easily
8733 allow for future expansion to 64 bits if necessary. Also, on some
8734 systems, it would not be appropriate to demultiplex the access
8735 width (8, 16, 32,or 64) before calling the OSL if the
8736 corresponding native OS interfaces contain a similar access width
8737 parameter. For these reasons, the 18 address space interfaces
8738 have been replaced by these 6 new ones:
8740 AcpiOsReadPciConfiguration
8741 AcpiOsWritePciConfiguration
8747 Added a new interface named AcpiOsGetRootPointer to allow the OSL
8748 to perform the platform and/or OS-specific actions necessary to
8749 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
8750 interface will simply call down to the CA core to perform the low-
8751 memory search for the table. On IA-64, the RSDP is obtained from
8752 EFI. Migrating this interface to the OSL allows the CA core to
8754 remain OS and platform independent.
8756 Added a new interface named AcpiOsSignal to provide a generic
8757 "function code and pointer" interface for various miscellaneous
8758 signals and notifications that must be made to the host OS. The
8759 first such signals are intended to support the ASL Fatal and
8760 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
8761 interface has been obsoleted.
8763 The definition of the AcpiFormatException interface has been
8764 changed to simplify its use. The caller no longer must supply a
8765 buffer to the call; A pointer to a const string is now returned
8766 directly. This allows the call to be easily used in printf
8767 statements, etc. since the caller does not have to manage a local
8771 ASL Compiler, Version X2025:
8773 The ACPI 2.0 Switch/Case/Default operators have been implemented
8774 and are fully functional. They will work with all ACPI 1.0
8775 interpreters, since the operators are simply translated to If/Else
8778 The ACPI 2.0 ElseIf operator is implemented and will also work
8779 with 1.0 interpreters, for the same reason.
8781 Implemented support for ACPI 2.0 variable-length packages. These
8782 packages have a separate opcode, and their size is determined by
8783 the interpreter at run-time.
8785 Documentation The ACPI CA Programmer Reference has been updated to
8786 reflect the new interfaces and changes to existing interfaces.
8788 ------------------------------------------
8789 Summary of changes for this label: 06_15_01
8791 ACPI CA Core Subsystem:
8793 Fixed a problem where a DWORD-accessed field within a Buffer
8794 object would get its byte address inadvertently rounded down to
8795 the nearest DWORD. Buffers are always Byte-accessible.
8797 ASL Compiler, version X2024:
8799 Fixed a problem where the Switch() operator would either fault or
8800 hang the compiler. Note however, that the AML code for this ACPI
8801 2.0 operator is not yet implemented.
8803 Compiler uses the new AcpiOsGetTimer interface to obtain compile
8806 Implementation of the CreateField operator automatically converts
8807 a reference to a named field within a resource descriptor from a
8808 byte offset to a bit offset if required.
8810 Added some missing named fields from the resource descriptor
8811 support. These are the names that are automatically created by the
8812 compiler to reference fields within a descriptor. They are only
8813 valid at compile time and are not passed through to the AML
8816 Resource descriptor named fields are now typed as Integers and
8817 subject to compile-time typechecking when used in expressions.
8819 ------------------------------------------
8820 Summary of changes for this label: 05_18_01
8822 ACPI CA Core Subsystem:
8824 Fixed a couple of problems in the Field support code where bits
8825 from adjacent fields could be returned along with the proper field
8826 bits. Restructured the field support code to improve performance,
8827 readability and maintainability.
8829 New DEBUG_PRINTP macro automatically inserts the procedure name
8830 into the output, saving hundreds of copies of procedure name
8831 strings within the source, shrinking the memory footprint of the
8832 debug version of the core subsystem.
8834 Source Code Structure:
8836 The source code directory tree was restructured to reflect the
8837 current organization of the component architecture. Some files
8838 and directories have been moved and/or renamed.
8842 Fixed leaking kacpidpc processes.
8844 Fixed queueing event data even when /proc/acpi/event is not
8847 ASL Compiler, version X2020:
8849 Memory allocation performance enhancement - over 24X compile time
8850 improvement on large ASL files. Parse nodes and namestring
8851 buffers are now allocated from a large internal compiler buffer.
8853 The temporary .SRC file is deleted unless the "-s" option is
8856 The "-d" debug output option now sends all output to the .DBG file
8857 instead of the console.
8859 "External" second parameter is now optional
8861 "ElseIf" syntax now properly allows the predicate
8863 Last operand to "Load" now recognized as a Target operand
8865 Debug object can now be used anywhere as a normal object.
8867 ResourceTemplate now returns an object of type BUFFER
8869 EISAID now returns an object of type INTEGER
8871 "Index" now works with a STRING operand
8873 "LoadTable" now accepts optional parameters
8875 "ToString" length parameter is now optional
8877 "Interrupt (ResourceType," parse error fixed.
8879 "Register" with a user-defined region space parse error fixed
8881 Escaped backslash at the end of a string ("\\") scan/parse error
8884 "Revision" is now an object of type INTEGER.
8888 ------------------------------------------
8889 Summary of changes for this label: 05_02_01
8893 /proc/acpi/event now blocks properly.
8895 Removed /proc/sys/acpi. You can still dump your DSDT from
8898 ACPI CA Core Subsystem:
8900 Fixed a problem introduced in the previous label where some of the
8901 "small" resource descriptor types were not recognized.
8903 Improved error messages for the case where an ASL Field is outside
8904 the range of the parent operation region.
8906 ASL Compiler, version X2018:
8909 Added error detection for ASL Fields that extend beyond the length
8910 of the parent operation region (only if the length of the region
8911 is known at compile time.) This includes fields that have a
8912 minimum access width that is smaller than the parent region, and
8913 individual field units that are partially or entirely beyond the
8914 extent of the parent.
8918 ------------------------------------------
8919 Summary of changes for this label: 04_27_01
8921 ACPI CA Core Subsystem:
8923 Fixed a problem where the namespace mutex could be released at the
8924 wrong time during execution of AcpiRemoveAddressSpaceHandler.
8926 Added optional thread ID output for debug traces, to simplify
8927 debugging of multiple threads. Added context switch notification
8928 when the debug code realizes that a different thread is now
8929 executing ACPI code.
8931 Some additional external data types have been prefixed with the
8932 string "ACPI_" for consistency. This may effect existing code.
8933 The data types affected are the external callback typedefs - e.g.,
8935 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
8939 Fixed an issue with the OSL semaphore implementation where a
8940 thread was waking up with an error from receiving a SIGCHLD
8943 Linux version of ACPI CA now uses the system C library for string
8944 manipulation routines instead of a local implementation.
8946 Cleaned up comments and removed TBDs.
8948 ASL Compiler, version X2017:
8950 Enhanced error detection and reporting for all file I/O
8955 Programmer Reference updated to version 1.06.
8959 ------------------------------------------
8960 Summary of changes for this label: 04_13_01
8962 ACPI CA Core Subsystem:
8964 Restructured support for BufferFields and RegionFields.
8965 BankFields support is now fully operational. All known 32-bit
8966 limitations on field sizes have been removed. Both BufferFields
8967 and (Operation) RegionFields are now supported by the same field
8970 Resource support now supports QWORD address and IO resources. The
8971 16/32/64 bit address structures and the Extended IRQ structure
8972 have been changed to properly handle Source Resource strings.
8974 A ThreadId of -1 is now used to indicate a "mutex not acquired"
8975 condition internally and must never be returned by AcpiOsThreadId.
8976 This reserved value was changed from 0 since Unix systems allow a
8981 Driver code reorganized to enhance portability
8983 Added a kernel configuration option to control ACPI_DEBUG
8985 Fixed the EC driver to honor _GLK.
8987 ASL Compiler, version X2016:
8989 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
8990 address space was set to 0, not 0x7f as it should be.
8992 ------------------------------------------
8993 Summary of changes for this label: 03_13_01
8995 ACPI CA Core Subsystem:
8997 During ACPI initialization, the _SB_._INI method is now run if
9000 Notify handler fix - notifies are deferred until the parent method
9001 completes execution. This fixes the "mutex already acquired"
9002 issue seen occasionally.
9004 Part of the "implicit conversion" rules in ACPI 2.0 have been
9005 found to cause compatibility problems with existing ASL/AML. The
9006 convert "result-to-target-type" implementation has been removed
9007 for stores to method Args and Locals. Source operand conversion
9008 is still fully implemented. Possible changes to ACPI 2.0
9009 specification pending.
9011 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
9014 Fix for compiler warnings for 64-bit compiles.
9018 /proc output aligned for easier parsing.
9020 Release-version compile problem fixed.
9022 New kernel configuration options documented in Configure.help.
9024 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
9029 Power resource driver integrated with bus manager.
9031 Fixed kernel fault during active cooling for thermal zones.
9035 The source code tree has been restructured.
9039 ------------------------------------------
9040 Summary of changes for this label: 03_02_01
9042 Linux OS Services Layer (OSL):
9044 Major revision of all Linux-specific code.
9046 Modularized all ACPI-specific drivers.
9048 Added new thermal zone and power resource drivers.
9050 Revamped /proc interface (new functionality is under /proc/acpi).
9052 New kernel configuration options.
9056 New kernel configuration options not documented in Configure.help
9060 Module dependencies not currently implemented. If used, they
9061 should be loaded in this order: busmgr, power, ec, system,
9062 processor, battery, ac_adapter, button, thermal.
9064 Modules will not load if CONFIG_MODVERSION is set.
9066 IBM 600E - entering S5 may reboot instead of shutting down.
9068 IBM 600E - Sleep button may generate "Invalid <NULL> context"
9071 Some systems may fail with "execution mutex already acquired"
9074 ACPI CA Core Subsystem:
9076 Added a new OSL Interface, AcpiOsGetThreadId. This was required
9077 for the deadlock detection code. Defined to return a non-zero, 32-
9078 bit thread ID for the currently executing thread. May be a non-
9079 zero constant integer on single-thread systems.
9081 Implemented deadlock detection for internal subsystem mutexes. We
9082 may add conditional compilation for this code (debug only) later.
9084 ASL/AML Mutex object semantics are now fully supported. This
9085 includes multiple acquires/releases by owner and support for the
9087 Mutex SyncLevel parameter.
9089 A new "Force Release" mechanism automatically frees all ASL
9090 Mutexes that have been acquired but not released when a thread
9091 exits the interpreter. This forces conformance to the ACPI spec
9092 ("All mutexes must be released when an invocation exits") and
9093 prevents deadlocked ASL threads. This mechanism can be expanded
9094 (later) to monitor other resource acquisitions if OEM ASL code
9095 continues to misbehave (which it will).
9097 Several new ACPI exception codes have been added for the Mutex
9100 Recursive method calls are now allowed and supported (the ACPI
9101 spec does in fact allow recursive method calls.) The number of
9102 recursive calls is subject to the restrictions imposed by the
9103 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
9106 Implemented support for the SyncLevel parameter for control
9107 methods (ACPI 2.0 feature)
9109 Fixed a deadlock problem when multiple threads attempted to use
9112 Fixed a problem where the string length of a String package
9113 element was not always set in a package returned from
9116 Fixed a problem where the length of a String package element was
9117 not always included in the length of the overall package returned
9118 from AcpiEvaluateObject.
9120 Added external interfaces (Acpi*) to the ACPI debug memory
9121 manager. This manager keeps a list of all outstanding
9122 allocations, and can therefore detect memory leaks and attempts to
9123 free memory blocks more than once. Useful for code such as the
9124 power manager, etc. May not be appropriate for device drivers.
9125 Performance with the debug code enabled is slow.
9127 The ACPI Global Lock is now an optional hardware element.
9129 ASL Compiler Version X2015:
9131 Integrated changes to allow the compiler to be generated on
9134 Linux makefile added to generate the compiler on Linux
9138 All platform-specific headers have been moved to their own
9139 subdirectory, Include/Platform.
9141 New source file added, Interpreter/ammutex.c
9143 New header file, Include/acstruct.h
9147 The programmer reference has been updated for the following new
9148 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
9150 ------------------------------------------
9151 Summary of changes for this label: 02_08_01
9153 Core ACPI CA Subsystem: Fixed a problem where an error was
9154 incorrectly returned if the return resource buffer was larger than
9155 the actual data (in the resource interfaces).
9157 References to named objects within packages are resolved to the
9159 full pathname string before packages are returned directly (via
9160 the AcpiEvaluateObject interface) or indirectly via the resource
9163 Linux OS Services Layer (OSL):
9165 Improved /proc battery interface.
9168 Added C-state debugging output and other miscellaneous fixes.
9170 ASL Compiler Version X2014:
9172 All defined method arguments can now be used as local variables,
9173 including the ones that are not actually passed in as parameters.
9174 The compiler tracks initialization of the arguments and issues an
9175 exception if they are used without prior assignment (just like
9178 The -o option now specifies a filename prefix that is used for all
9179 output files, including the AML output file. Otherwise, the
9180 default behavior is as follows: 1) the AML goes to the file
9181 specified in the DSDT. 2) all other output files use the input
9182 source filename as the base.
9184 ------------------------------------------
9185 Summary of changes for this label: 01_25_01
9187 Core ACPI CA Subsystem: Restructured the implementation of object
9188 store support within the interpreter. This includes support for
9189 the Store operator as well as any ASL operators that include a
9192 Partially implemented support for Implicit Result-to-Target
9193 conversion. This is when a result object is converted on the fly
9194 to the type of an existing target object. Completion of this
9195 support is pending further analysis of the ACPI specification
9196 concerning this matter.
9198 CPU-specific code has been removed from the subsystem (hardware
9201 New Power Management Timer functions added
9203 Linux OS Services Layer (OSL): Moved system state transition code
9204 to the core, fixed it, and modified Linux OSL accordingly.
9206 Fixed C2 and C3 latency calculations.
9209 We no longer use the compilation date for the version message on
9210 initialization, but retrieve the version from AcpiGetSystemInfo().
9212 Incorporated for fix Sony VAIO machines.
9214 Documentation: The Programmer Reference has been updated and
9218 ASL Compiler: Version X2013: Fixed a problem where the line
9219 numbering and error reporting could get out of sync in the
9220 presence of multiple include files.
9222 ------------------------------------------
9223 Summary of changes for this label: 01_15_01
9225 Core ACPI CA Subsystem:
9227 Implemented support for type conversions in the execution of the
9228 ASL Concatenate operator (The second operand is converted to
9229 match the type of the first operand before concatenation.)
9231 Support for implicit source operand conversion is partially
9232 implemented. The ASL source operand types Integer, Buffer, and
9233 String are freely interchangeable for most ASL operators and are
9234 converted by the interpreter on the fly as required. Implicit
9235 Target operand conversion (where the result is converted to the
9236 target type before storing) is not yet implemented.
9238 Support for 32-bit and 64-bit BCD integers is implemented.
9240 Problem fixed where a field read on an aligned field could cause a
9241 read past the end of the field.
9243 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
9244 does not return a value, but the caller expects one. (The ASL
9245 compiler flags this as a warning.)
9250 1. Static typechecking of all operands is implemented. This
9251 prevents the use of invalid objects (such as using a Package where
9252 an Integer is required) at compile time instead of at interpreter
9254 2. The ASL source line is printed with ALL errors and warnings.
9255 3. Bug fix for source EOF without final linefeed.
9256 4. Debug option is split into a parse trace and a namespace trace.
9257 5. Namespace output option (-n) includes initial values for
9258 integers and strings.
9259 6. Parse-only option added for quick syntax checking.
9260 7. Compiler checks for duplicate ACPI name declarations
9263 1. Relaxed typechecking to allow interchangeability between
9264 strings, integers, and buffers. These types are now converted by
9265 the interpreter at runtime.
9266 2. Compiler reports time taken by each internal subsystem in the
9270 ------------------------------------------
9271 Summary of changes for this label: 12_14_00
9275 This is the first official release of the compiler. Since the
9276 compiler requires elements of the Core Subsystem, this label
9277 synchronizes everything.
9279 ------------------------------------------
9280 Summary of changes for this label: 12_08_00
9283 Fixed a problem where named references within the ASL definition
9284 of both OperationRegions and CreateXXXFields did not work
9285 properly. The symptom was an AE_AML_OPERAND_TYPE during
9286 initialization of the region/field. This is similar (but not
9287 related internally) to the problem that was fixed in the last
9290 Implemented both 32-bit and 64-bit support for the BCD ASL
9291 functions ToBCD and FromBCD.
9293 Updated all legal headers to include "2000" in the copyright
9296 ------------------------------------------
9297 Summary of changes for this label: 12_01_00
9299 Fixed a problem where method invocations within the ASL definition
9300 of both OperationRegions and CreateXXXFields did not work
9301 properly. The symptom was an AE_AML_OPERAND_TYPE during
9302 initialization of the region/field:
9304 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
9305 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
9308 Fixed a problem where operators with more than one nested
9309 subexpression would fail. The symptoms were varied, by mostly
9310 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
9311 problem that has gone unnoticed until now.
9313 Subtract (Add (1,2), Multiply (3,4))
9315 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
9316 previous build (The prefix part of a relative path was handled
9319 Fixed a problem where Operation Region initialization failed if
9320 the operation region name was a "namepath" instead of a simple
9321 "nameseg". Symptom was an AE_NO_OPERAND error.
9323 Fixed a problem where an assignment to a local variable via the
9324 indirect RefOf mechanism only worked for the first such
9325 assignment. Subsequent assignments were ignored.
9327 ------------------------------------------
9328 Summary of changes for this label: 11_15_00
9330 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
9331 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
9332 the AML interpreter does NOT have support for the new 2.0 ASL
9333 grammar terms at this time.
9335 All ACPI hardware access is via the GAS structures in the ACPI 2.0
9338 All physical memory addresses across all platforms are now 64 bits
9339 wide. Logical address width remains dependent on the platform
9342 AcpiOsMapMemory interface changed to a 64-bit physical address.
9344 The AML interpreter integer size is now 64 bits, as per the ACPI
9347 For backwards compatibility with ACPI 1.0, ACPI tables with a
9348 revision number less than 2 use 32-bit integers only.
9350 Fixed a problem where the evaluation of OpRegion operands did not
9351 always resolve them to numbers properly.
9353 ------------------------------------------
9354 Summary of changes for this label: 10_20_00
9356 Fix for CBN_._STA issue. This fix will allow correct access to
9357 CBN_ OpRegions when the _STA returns 0x8.
9359 Support to convert ACPI constants (Ones, Zeros, One) to actual
9360 values before a package object is returned
9362 Fix for method call as predicate to if/while construct causing
9363 incorrect if/while behavior
9365 Fix for Else block package lengths sometimes calculated wrong (if
9368 Fix for Processor object length field, was always zero
9370 Table load abort if FACP sanity check fails
9372 Fix for problem with Scope(name) if name already exists
9374 Warning emitted if a named object referenced cannot be found
9375 (resolved) during method execution.
9381 ------------------------------------------
9382 Summary of changes for this label: 9_29_00
9384 New table initialization interfaces: AcpiInitializeSubsystem no
9385 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
9386 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
9387 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
9390 Note: These interface changes require changes to all existing OSDs
9392 The PCI_Config default address space handler is always installed
9393 at the root namespace object.
9395 -------------------------------------------
9396 Summary of changes for this label: 09_15_00
9398 The new initialization architecture is implemented. New
9399 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
9400 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
9402 (Namespace is automatically loaded when a table is loaded)
9404 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
9405 52 bytes to 32 bytes. There is usually one of these for every
9406 namespace object, so the memory savings is significant.
9408 Implemented just-in-time evaluation of the CreateField operators.
9410 Bug fixes for IA-64 support have been integrated.
9412 Additional code review comments have been implemented
9414 The so-called "third pass parse" has been replaced by a final walk
9415 through the namespace to initialize all operation regions (address
9416 spaces) and fields that have not yet been initialized during the
9417 execution of the various _INI and REG methods.
9419 New file - namespace/nsinit.c
9421 -------------------------------------------
9422 Summary of changes for this label: 09_01_00
9424 Namespace manager data structures have been reworked to change the
9425 primary object from a table to a single object. This has
9426 resulted in dynamic memory savings of 3X within the namespace and
9427 2X overall in the ACPI CA subsystem.
9429 Fixed problem where the call to AcpiEvFindPciRootBuses was
9430 inadvertently left commented out.
9432 Reduced the warning count when generating the source with the GCC
9435 Revision numbers added to each module header showing the
9436 SourceSafe version of the file. Please refer to this version
9437 number when giving us feedback or comments on individual modules.
9439 The main object types within the subsystem have been renamed to
9440 clarify their purpose:
9442 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
9443 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
9444 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
9446 NOTE: no changes to the initialization sequence are included in
9449 -------------------------------------------
9450 Summary of changes for this label: 08_23_00
9452 Fixed problem where TerminateControlMethod was being called
9453 multiple times per method
9455 Fixed debugger problem where single stepping caused a semaphore to
9458 Improved performance through additional parse object caching -
9459 added ACPI_EXTENDED_OP type
9461 -------------------------------------------
9462 Summary of changes for this label: 08_10_00
9464 Parser/Interpreter integration: Eliminated the creation of
9465 complete parse trees for ACPI tables and control methods.
9466 Instead, parse subtrees are created and then deleted as soon as
9467 they are processed (Either entered into the namespace or executed
9468 by the interpreter). This reduces the use of dynamic kernel
9469 memory significantly. (about 10X)
9471 Exception codes broken into classes and renumbered. Be sure to
9472 recompile all code that includes acexcep.h. Hopefully we won't
9473 have to renumber the codes again now that they are split into
9474 classes (environment, programmer, AML code, ACPI table, and
9477 Fixed some additional alignment issues in the Resource Manager
9480 Implemented semaphore tracking in the AcpiExec utility, and fixed
9481 several places where mutexes/semaphores were being unlocked
9482 without a corresponding lock operation. There are no known
9483 semaphore or mutex "leaks" at this time.
9485 Fixed the case where an ASL Return operator is used to return an
9488 -------------------------------------------
9489 Summary of changes for this label: 07_28_00
9491 Fixed a problem with the way addresses were calculated in
9492 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
9493 manifested itself when a Field was created with WordAccess or
9494 DwordAccess, but the field unit defined within the Field was less
9496 than a Word or Dword.
9498 Fixed a problem in AmlDumpOperands() module's loop to pull
9499 operands off of the operand stack to display information. The
9500 problem manifested itself as a TLB error on 64-bit systems when
9501 accessing an operand stack with two or more operands.
9503 Fixed a problem with the PCI configuration space handlers where
9504 context was getting confused between accesses. This required a
9505 change to the generic address space handler and address space
9506 setup definitions. Handlers now get both a global handler context
9507 (this is the one passed in by the user when executing
9508 AcpiInstallAddressSpaceHandler() and a specific region context
9509 that is unique to each region (For example, the _ADR, _SEG and
9510 _BBN values associated with a specific region). The generic
9511 function definitions have changed to the following:
9513 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
9514 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
9515 *HandlerContext, // This used to be void *Context void
9516 *RegionContext); // This is an additional parameter
9518 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
9519 RegionHandle, UINT32 Function, void *HandlerContext, void
9520 **RegionContext); // This used to be **ReturnContext
9522 -------------------------------------------
9523 Summary of changes for this label: 07_21_00
9525 Major file consolidation and rename. All files within the
9526 interpreter have been renamed as well as most header files. This
9527 was done to prevent collisions with existing files in the host
9528 OSs -- filenames such as "config.h" and "global.h" seem to be
9529 quite common. The VC project files have been updated. All
9530 makefiles will require modification.
9532 The parser/interpreter integration continues in Phase 5 with the
9533 implementation of a complete 2-pass parse (the AML is parsed
9534 twice) for each table; This avoids the construction of a huge
9535 parse tree and therefore reduces the amount of dynamic memory
9536 required by the subsystem. Greater use of the parse object cache
9537 means that performance is unaffected.
9539 Many comments from the two code reviews have been rolled in.
9541 The 64-bit alignment support is complete.
9543 -------------------------------------------
9544 Summary of changes for this label: 06_30_00
9546 With a nod and a tip of the hat to the technology of yesteryear,
9547 we've added support in the source code for 80 column output
9548 devices. The code is now mostly constrained to 80 columns or
9549 less to support environments and editors that 1) cannot display
9550 or print more than 80 characters on a single line, and 2) cannot
9551 disable line wrapping.
9553 A major restructuring of the namespace data structure has been
9554 completed. The result is 1) cleaner and more
9555 understandable/maintainable code, and 2) a significant reduction
9556 in the dynamic memory requirement for each named ACPI object
9559 -------------------------------------------
9560 Summary of changes for this label: 06_23_00
9562 Linux support has been added. In order to obtain approval to get
9563 the ACPI CA subsystem into the Linux kernel, we've had to make
9564 quite a few changes to the base subsystem that will affect all
9565 users (all the changes are generic and OS- independent). The
9566 effects of these global changes have been somewhat far reaching.
9567 Files have been merged and/or renamed and interfaces have been
9568 renamed. The major changes are described below.
9570 Osd* interfaces renamed to AcpiOs* to eliminate namespace
9571 pollution/confusion within our target kernels. All OSD
9572 interfaces must be modified to match the new naming convention.
9574 Files merged across the subsystem. A number of the smaller source
9575 and header files have been merged to reduce the file count and
9576 increase the density of the existing files. There are too many
9577 to list here. In general, makefiles that call out individual
9578 files will require rebuilding.
9580 Interpreter files renamed. All interpreter files now have the
9581 prefix am* instead of ie* and is*.
9583 Header files renamed: The acapi.h file is now acpixf.h. The
9584 acpiosd.h file is now acpiosxf.h. We are removing references to
9585 the acronym "API" since it is somewhat windowsy. The new name is
9586 "external interface" or xface or xf in the filenames.j
9589 All manifest constants have been forced to upper case (some were
9590 mixed case.) Also, the string "ACPI_" has been prepended to many
9591 (not all) of the constants, typedefs, and structs.
9593 The globals "DebugLevel" and "DebugLayer" have been renamed
9594 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
9596 All other globals within the subsystem are now prefixed with
9597 "AcpiGbl_" Internal procedures within the subsystem are now
9598 prefixed with "Acpi" (with only a few exceptions). The original
9599 two-letter abbreviation for the subcomponent remains after "Acpi"
9600 - for example, CmCallocate became AcpiCmCallocate.
9602 Added a source code translation/conversion utility. Used to
9603 generate the Linux source code, it can be modified to generate
9604 other types of source as well. Can also be used to cleanup
9605 existing source by removing extraneous spaces and blank lines.
9606 Found in tools/acpisrc/*
9608 OsdUnMapMemory was renamed to OsdUnmapMemory and then
9609 AcpiOsUnmapMemory. (UnMap became Unmap).
9611 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
9612 When set to one, this indicates that the caller wants to use the
9614 semaphore as a mutex, not a counting semaphore. ACPI CA uses
9615 both types. However, implementers of this call may want to use
9616 different OS primitives depending on the type of semaphore
9617 requested. For example, some operating systems provide separate
9619 "mutex" and "semaphore" interfaces - where the mutex interface is
9620 much faster because it doesn't have all the overhead of a full
9621 semaphore implementation.
9623 Fixed a deadlock problem where a method that accesses the PCI
9624 address space can block forever if it is the first access to the
9627 -------------------------------------------
9628 Summary of changes for this label: 06_02_00
9630 Support for environments that cannot handle unaligned data
9631 accesses (e.g. firmware and OS environments devoid of alignment
9632 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
9633 been added (via configurable macros) in these three areas: -
9634 Transfer of data from the raw AML byte stream is done via byte
9635 moves instead of word/dword/qword moves. - External objects are
9636 aligned within the user buffer, including package elements (sub-
9637 objects). - Conversion of name strings to UINT32 Acpi Names is now
9640 The Store operator was modified to mimic Microsoft's
9641 implementation when storing to a Buffer Field.
9643 Added a check of the BM_STS bit before entering C3.
9645 The methods subdirectory has been obsoleted and removed. A new
9646 file, cmeval.c subsumes the functionality.
9648 A 16-bit (DOS) version of AcpiExec has been developed. The
9649 makefile is under the acpiexec directory.